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    Generated on Saturday, April 2nd 2016 8:52 am

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Traffic Rank

5,989 most visited website in the World Trend: up (-455)
59 most visited website in VN Vietnam
Traffic Rank is provided by Alexa

Visitors Localization

Low map legend High
CountryPercentDomain (ccTLD)Status
US United States2.3%tinhte.usNot available.
KR South Korea2.0%tinhte.krNot available.
JP Japan1.1%tinhte.jpNot available.
TW Taiwan0.8%tinhte.twNot available.
Registering country code top level domains (ccTLD) can prevent potential competitors from taking advantage of your primary domain reputation. It is also one of the ways to improve country specific SEO and performance. (


We have located images with missing ALT attribute.
Number of images: 74
Missing alt tag: 44

List of images with missing ALT attributes:

  • styles/uiflex/dimota/logo_small.png
  • (2 locations)
  • (2 locations)
The "alt" attribute provides a text equivalent for the image. If the browser cannot display an image the alt description will be given in its place. Furthermore, some visitors cannot see images as they might be blind in which the alt tag provides a valuable image description. Finally, search engines utilize the alt attribute for image search indexing. (


We have found following title:

"Cộng đồng Khoa học & Công nghệ |"

Length: 42 characters
The <TITLE> element provides a short piece of text describing the document. The title is very important as it shows in the window title bars, bookmarks and search results. Title should be between 60 to 80 characters long. (

Description Metatag

No Description Found.
The description attribute should provide a concise explanation of a Web page's content. Also, the description is often displayed on search engine results and can indirectly affect page ranking. (

Keywords Metatag

No Keywords Found.
The keywords attribute was utilized by search engines to provide more accurate search results. Due to the over usage and spamming the keywords attribute has been phased out and is no longer relevant. Google doesn't use the "keywords" meta tag in web search ranking.(

Text to HTML Ratio

The Text to HTML ratio is 24.04%
Original content is by far the single most important element to search engines. Low Text to HTML ratio indicates little content for search engines to index. We consider it to be good practice to have a Text to HTML ratio of at least 10% and ideal above 20%

Keyword Density & Consistency

Consistent Keywords % Density # Count T Title D Desc. H <H> A ALT B <b>
đang tải0.85%39-----
điện thoại0.63%29--3--
mua bán0.52%24-----
máy tính0.50%23--1--
hôm nay0.48%22-----
hôm nay lúc0.43%20-----
liên kết nhanh0.22%10-----
tại việt nam0.15%7--1--
hôm qua lúc0.15%7-----
thảo luận mới0.15%7-----
Keywords density and consistency are notable factors for optimal page SEO. Preferred keywords should have higher keywords density indicating their importance. Optimally, preferred keywords should also be consistently utilized in multiple essential areas of the page such as title, description meta tag, h1 through h6 headings, alt image attributes, backlinks and internal links anchor text. Keyword density of above 5% is a good indication that the word or phrase appears too many time in the content. (more information)


No frames detected.
It is not recommended to use frames or iframes because they can cause problems for search engines. It is best to avoid frames and inline frames whenever possible ( If frames must be utilized consider <noframes> tag. (


No flash detected.
Flash and other reach-media technologies should primarily be utilized for decorative purposes. This makes your site more search engine friendly and improves accessibility (


  • 0 <H1>
  • 30 <H2>
    • iPhone SE, iPhone 6s và iPhone 5s ngâm nước: sau 1 tiếng SE và 6s vẫn chạy tốt, 5s chỉ được 5 phút
    • [BMS 2016] Xem trước Mercedes-Benz GLC-Class sắp ra mắt tại Việt Nam
    • [Infographic] Tập luyện thể thao tác động như thế nào tới não bộ?
    • Gỗ trong suốt - vật liệu hứa hẹn thay thế thủy tinh trong tương lai
    • Bên trong iPhone SE: màn hình, loa, bộ rung đổi được với 5s, có ron chống nước, 6/10 điểm iFixit
    • Samsung S7 Edge đạt hơn 18 tiếng sử dụng hỗn hợp
    • MIT phát triển cách loại bỏ hiện tượng phản chiếu khi chụp ảnh qua kính
    • Rò rỉ ảnh và cấu hình Panasonic GX80: máy ảnh quay phim 4K, chống rung 5 trục, lấy nét sau
    • Samsung sẽ giới thiệu điện thoại màn hình gập trong năm sau
    • 24 hình/giây và câu chuyện về tốc độ khung hình vàng của điện ảnh
    • Nhà thiết kế Hồng Kông chế tạo robot có hình dáng giống nữ diễn viên Scarlett Johansson
    • Tổng hợp một số cá lớn trong ngày cá tháng tư vừa qua về nhiếp ảnh
    • Trao quyền quản lý hệ thống sóng radio cho trí thông minh nhân tạo để tăng hiệu quả truyền tín hiệu
    • Gb Pockit - xe đẩy em bé có thể gấp lại
    • Windows 10 sẽ có widget gắn vào khu vực thông báo
    • 20 trò đùa trong giới công nghệ trong ngày Cá tháng tư
    • [QC] Huawei Chính Thức Ra Mắt điện thoại Y6 Pro độc quyền tại hệ thống Viettel Store
    • Microsoft có một thông điệp ẩn trong slide thuyết trình Windows 10 Anniversary Update
    • LG G5 bán được 15.000 máy trong ngày đầu ra mắt ở Hàn Quốc, gấp 3 lần LG G4
    • [QC] Total mang cảm hứng thể thao & trình làng đỉnh cao công nghệ tại Triển lãm mô tô, xe máy
    • HTC 10 Mini sẽ dùng chip Snapdragon 823, RAM 4GB, màn hình 4,7", tháng 9 ra mắt?
    • Lộ diện Nokia A1 trung cấp, ra mắt giữa mùa hè
    • Tesla đã nhận được hơn 180.000 đơn hàng Model 3 trong 24 giờ, ước tính thu về 7,5 tỷ USD
    • Máy ảnh DSLR Nikon D5 đã chính thức được giới thiệu tại thị trường Việt Nam
    • So sánh Camera: Galaxy S7 & LG V10
    • Lái thử Mercedes-Benz GLE 400 4MATIC Exclusive - chiếc SUV tuyệt vời
    • Night Shift có thực sự giúp bạn chìm vào giấc ngủ dễ dàng hơn?
    • NASA sẽ đưa nấm lên vũ trụ để hỗ trợ bào chế thuốc
    • Bên trong LG G5: kết cấu một phần kim loại một phần nhựa
    • Google Photos trên Android được cập nhật khả năng "sửa ảnh không phá huỷ" như phiên bản iOS
  • 22 <H3>
    • Trang nhất
    • Diễn đàn
    • Live
    • Điện thoại
    • Máy tính
    • Camera
    • Xe
    • KHCN
    • Bài mới
    • Rao vặt
    • Mục tìm hữu ích
    • Hội nghị lập trình viên Google I/O 2016 sẽ diễn ra từ ngày 18 đến 20 tháng 5 »
    • Trên tay gần đây »
    • Đánh giá gần đây »
    • Ảnh đẹp »
    • Infographic gần đây »
    • Quan tâm trong tuần
    • Cộng đồng
    • Diễn đàn
    • Nhật tảo
    • Liên kết
  • 0 <H4>
  • 0 <H5>
  • 0 <H6>
The <h1> to <h6> tags are used to define HTML headings. The <h1> tag should hold the title describing the content of a specific page therefore only one h1 tag is needed per page. There can be any number of h2 - h6 tags but they should be added in order of importance (


The <!DOCTYPE> declaration tells the web browser about what version of HTML the page is written in. It is good practice to always add the <!DOCTYPE> declaration to the HTML documents, so that the browser knows what type of document to expect. (

Character Encoding

UTF-8 (Unicode)
Covers: Worldwide
To display an HTML page correctly, the browser must know what character-set to use (


Declared Language: vi-VN (Vietnamese)
Language Attribute: vi-VN (Vietnamese)
The HTML "lang" attributes and language metatag define the base language to be used for displaying text and characters on a Website.

W3C Markup Validation

Status: FAILED [168 errors, 81 warning(s)]
It is good practice to use valid HTML/XHTML markup as it ensures that the search engines can read the website correctly as well as it improves cross browser compatibility (W3C Markup Validation Service).

Deprecated HTML elements

Good, no deprecated elements found.
A deprecated element is one that has been outdated by newer constructs. Deprecated elements may become obsolete in future versions of HTML so it is recommended not to use them. (

Nested HTML Tables

Great, no nested tables detected.
In general it is not recommended to use nested tables or to utilize tables for page layout. Nested tables are known to cause performance issues due to increased HTML size and rendering time. It is better to use CSS layout instead.

Web Analytics

Yes, we have detected following web anlytics tools:
  • Google analytics icon Google™ Analytics
Web Analytics Tools collect and measure information about visitor activity on a website. Well interpreted web traffic data is invaluable in determining a successfully web strategy and assessing the effectiveness of a website. At a minimum, we recommend to utilize at least one web analytics tool.


A robots.txt file restricts access to your site by search engine robots that crawl the web. (

XML Sitemap

Found following XML sitemap(s):
Sitemaps inform search engines about pages available for crawling. In its simplest form, a Sitemap is an XML file that lists URLs for a site along with additional metadata about each URL. XML sitemap should help search engines to crawl the site more intelligently. (

Mobile Rendering

Mobile internet usage has been exceeding PC's since 2014 and growing so it is critical for pages to render correctly on mobile devices.

Mobile Optimization

Mobile PageSpeed analyzes webpages and evaluates its performance while providing suggestions on reducing page load times. Google is incorporating website speed in search ranking (

Mobile Experience

Mobile users have now become a critical part of online visits. Making the website mobile friendly is no longer an option but rather necessity. (


The Favicon is a small icon associated with a website. The Favicon is important because it is displayed next to the website's URL in the address bar of the browser as well as in bookmarks and shortcuts. (

Custom 404 Error Page

Yes, custom 404 error page detected.
A 404 is a standard http response code for a resource that cannot be located on the server. Webservers usually return a "404 Not Found" error page for non-existing pages. Unfortunately, these default error pages are very generic and a not very user friendly, therefore, using a custom 404 error page is highly recommended.

Process of returning http status code "200 OK" for a non-existent page or redirecting users to another url is called soft 404. Soft 404 errors are problematic for search engines and are not advisable. (


Could not locate print-friendly CSS.
Print-friendly pages are designed to fit on an 8.5"x11" or A4 sheet and usually include only the content of the page, along with source information. (

W3C CSS Validation

Status: FAILED [348 error(s)]
It is recommended to use valid CSS to ensure that the website displays correctly. (W3C CSS Validation Service).

Page Rank

PR: 5 out of 10 (Good)
PageRank is Google's measure of the importance of a page. It is based on complex algorithmes evaluating page content, authority, keyword density, back links, traffic, demand and more. (

Indexed Pages

Estimated number of pages indexed by Google™: about 600K
Estimated number of pages indexed by Bing™: about 300K
The higher number of indexed pages the more content search engines can index, which increases overall value of the website. (

Domain Age

Data could not be obtained.
Age of the domain is one of the many signals that search engines utilize for ranking. Brand new domains generally have more difficult time to rank high for the first few months. (

Domain Expiration

Data could not be obtained.
Domain expiration far in to the future is considered a good practice as it promotes confidence in your website, decreases chances of losing domain and in certain cases might help with search engine ranking. (

IP Canonicalization

No, your site's IP does not redirect to
Some web spiders index websites using IP as well as domain name which can cause duplicate content if there is no IP Canonicalization. (

URL Canonicalization

Yes, both the and resolve to the same URL.
Warning: Current redirect is "HTTP/1.1 302 Found" but it should be "HTTP/1.1 301 Moved Permanently"
Domain name with WWW and without can be considered as different pages causing duplicate content for search engines. (

Page Speed

Google Page Speed score: 65% (Average)
Rq. Requests Hst. Hosts LT Load time Html Img Images JS JavaScript CSS F Flash O Other PS Page Size
141257.56s182.78 KB8.41 MB3.14 MB258.72 KB0 B22.05 KB12 MB

Avoid landing page redirects
Enable compression
Leverage browser caching
Reduce server response time
Minify CSS
Minify HTML
Minify JavaScript
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Optimize images
Prioritize visible content

Subscribe for more details
PageSpeed analyzes webpages and evaluates its performance while providing suggestions on reducing page load times. Google is now incorporating website speed in search ranking (

Server Information

Server IP:
Server Location:
VN HA NOI, Hanoi
Your server's IP address and location have minor impact on the country specific SEO. It is recommend to host the website in the country where the number of vistors is desired to be the highest. Search engines take the geolocation of a server into account. (


Issued To:
Common Name (CN):
Common Name (CN):
COMODO RSA Domain Validation Secure Server CA
Oranization (O):
Period of Validity
Begins On:
Expires On:
Google™ is now treating HTTPS as a ranking signal. HTTPS is a secure web protocol that allows for encrypted communication between website and the client. HTTPS protocol requires your website to have an SSL certificate, which can be purchased from a Certificate Authority (CA) or SSL vendor. (

Safe Browsing

Safe Browsing is a service provided by Google that enables applications to check URLs against Google's constantly updated lists of suspected phishing and malware pages. (

Spam Blacklist

Good, your IP is not blacklisted.
Spammer directories provide lists of IPs from which spam distribution is reported. Emails sent from the blocked IPs are subject to closer scrutiny and are much less likely to be delivered. For email campaigns it is recommended to utilize professional email services to ensure that your website IP is not blocked. (

Email Address Obfuscation

Great, this webpage does not contain email addresses displayed in plain text.
It is recommended to obfuscate email addresses posted in public. This prevents email addresses from being automatically harvested by spam bots which helps to decrease number of unsolicited emails.

Directory Browsing

Great, your server has directory browsing disabled.
Protect Webserver directories from unwanted browsing. To enhance security, directory browsing should be disabled unless you have a specific reason to enable it. If you enable directory browsing, make sure that you only enable it on the particular directory or directories that you want to share. (

Whois Privacy

No contact information available.
Whois Privacy is a service that prevents domain owner contact information from being displayed in the publicly available Whois records. This can help to cut down on unwanted spam but utilizing Whois privacy should be evaluated against business model and branding strategy.

Server Signature

On, nginx/1.6.3 PHP/5.4.16
Attackers can utilize server signature versioning information to their advantage therefore it is recommended to disable it when possible. (Disable server signature for Apache or IIS).

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