“Duplicate Content” là một trong những lỗi mà nhiều Webmaster mắc phải khi tiến hành SEO (Search Engine Optimize) cho website của mình. Trước hết, chúng ta tìm hiểu từ đâu có lỗi này.
Với Google hay nhiều trang tìm kiếm khác (SE) thì tên miền example.com và www.example.com là 2 tên miền hoàn toàn riêng biệt. Điều này gây ngạc nhiên với những ai nghĩ chúng vốn là một. Từ đó, rất nhiều vấn đề phát sinh từ sự suy nghĩ khác biệt giữa chúng ta và các trang tìm kiếm. Vấn đề đầu tiên chúng ta gặp là các nỗ lực của chúng ta trong việc SEO sẽ bị chia ra làm 2, một cho example.com và một cho www.example.com. Ví dụ bạn cố gắng liên kết đến 100 trang web nhưng một số trang dùng example.com và một số trang dùng www.example.com. Kết quả là bạn SEO cho 2 tên miền chứ không phải một như mình vẫn nghĩ. Và thay vì bạn có được 100 liên kết thì SE chỉ công nhận một % nào đó chứ không phải tất cả.
Vấn đề nữa mà bạn gặp phải đó là lặp lại thông tin. Các trang web www.example.com và example.com chắc chắn sẽ có cùng nội dung. Nhưng với các trang tìm kiếm thì sẽ có 1 trang bị đánh dấu là sao chép của trang kia bởi chung hoàn toàn riêng biệt nhau đồng nghĩa với việc vị trí xếp hạng của trang web đó sẽ bị đánh tụt xuống.
Vậy, làm sao để tránh? Rất đơn giản, hãy qui tất cả chúng về 1 mối. Hãy thống nhất chọn dùng www.example.com hay example.com để tiếp tục công việc SEO của mình. Sau đó, nếu khách truy cập địa chỉ còn lại thì chuyển khách truy cập đến địa chỉ đã chọn. Như vậy chúng ta chỉ có 1 trang là www.example.com còn trang example.com chỉ đóng vai trò là đường dẫn đến www.example.com và không hề có nội dung
Ví dụ, mình chọn www.example.com làm tên miền chính để quảng bá, thì những vị khách nào truy cập đến example.com sẽ chuyển đến địa chỉ tương ứng ở www.example.com.
Nếu website của bạn được viết bằng PHP và được hỗ trợ Apache, hãy thêm mấy dòng lệnh dưới đây vào file .htaccess :
Options +FollowSymLinks
RewriteEngine On
RewriteCond %{HTTP_HOST} ^domain.com$ [NC]
RewriteRule ^(.*)$ http://www.domain.com/$1 [R=301,L]
Sưu tầm
Enhance Your Site’s Usability and Improve SEO with a Site Map
Create a site map – A site map is a separate HTML page that acts as a directory of the pages on your website. Each page listed in the site map is hyperlinked.
Use keywords in the link anchor text and consider synonyms that might be commonly used in place of your keywords, such as plates for dishes. Also, since search engines seem to place more weight on text contained in a bulleted or numbered list, put your links in lists.
A site map is not only good for getting search engine spiders to follow your page links and easily crawl your entire site, it’s a useful tool for your visitors because it helps them find the content page they’re looking for. It may also help them click into pages they might have otherwise overlooked.
Anchor Hyperlinks with Keywords
Use keyword text in your links – The text used to anchor a link is important and needs to be keyword related whenever possible.
For example, link the text hand painted china to your hand-painted china page, do not use click here. No one searching for hand-painted china is likely to search for “click here”.
High Quality Inbound Links Can Boost Your Rankings and Site Traffic
Secure incoming links – Most website owners engage in reciprocal linking strategies – agreeing to exchange links with other sites. While this is helpful if you reciprocate with related, high-value websites, it is not nearly as effective as securing one-way links coming in to your site.
Getting a listing in a legitimate and frequently consulted web directory is valuable, even if you have to pay for the listing. The most trusted free directory on the web is DMOZ. The downside to DMOZ is that getting a listing will take some time – even 18 months or so in some cases. Additionally, you need to be careful to request the listing for the correct category for your website. If you don’t, you won’t get your listing.
Keyword Description Text Boosts SEO and Compels Searchers to Click
Make keywords part of a compelling description – Within the HTML code of your web page you want to include a Description tag. A description tag looks like this:
<META Name=”Description” Content=”Hand-painted china you’ll love at discounted prices. Hand Painted Creations features a fabulous collection of hand painted china, including dishes, tea cups, mugs and much, much more.”>
The content of a Description META tag is used by some, but not all, search engines in the search engine results page to describe the content of your page.
If the search engine your website visitor uses to find sites that use your keywords displays the contents of your Description tag, you want the searcher to be compelled to click the link to your site. Ranking number one doesn’t mean your link will get clicked.
Provide Plenty of Keyword-Focused Content on Your Website
Create useful keyword content – often – The saying “content is king” is true. The actual content on your site has everything to do with your search rankings.
New content should focus on your targeted keywords whenever possible. Repeat your keywords and related words in your text, but don’t overdo it to the extent where your content looks like spam, is grammatically incorrect or doesn’t serve its purpose.
The more often you update your content, the more the search engines will spider your site – walk through your content to see what it contains. The more content you create, the more likely you are to get noticed and opportunities to cross link to other keyword focused content are also increased, which helps improve the rankings for the content you’re linking to.
Making the Most Use of Your Targeted Keywords
Use keyword text, not images for your site’s navigation
This SEO technique gets your primary keywords on every page of your web site. The link leads to the page you are targeting for that keyword or phrase.
In the old days it was common to use image maps with hyperlinked hot spots for website navigation. Image maps are counterproductive when it comes to search engine optimization. It is still common to use images, such as buttons for website navigation. This too, is counterproductive because it doesn’t allow you to take best advantage of your keywords. While you can insert your keywords into the image’s ALT tag, linked text carries greater weight in the algorithms search engines use for rankings.
Search Engines Weigh Your Titles Heavily
Use your keywords in your page titles – What you place between <title> and </title> in the HTML for your web page is critical. Use your keywords, avoid prepositions and conjunctions where possible (the, and, for, with, etc.) and watch your punctuation within the title. Using only dashes between phrases in a title seems to help.
For example, Hand Painted China – Dishes – Mugs. It is not necessary and usually not advisable to waste space in your page’s title tag with your company’s name. If you do, put it at the end of the title – you want your keywords up front.
How You Name Your Website Files Matters for SEO
Use keywords in file names and folders – When you save a file to be posted on your website, use your keywords in the file names.
For example, hand-painted-china.html would be a great filename for a business that sells hand-painted china.
Because you are not prohibited from using the same filename as your competitors, as you would be with your domain name, and because you can do this regardless of whether you use a WYSIWYG editor like Front Page or Dreamweaver without knowing much HTML, this technique is quite easy to implement and make a regular practice.
Don’t leave blank spaces in your filenames. Use an underscore character ( _ ) or hyphen ( – ) instead. I find both equally useful.
Select the Right Domain Name to Improve SEO
Select the right domain name – If you don’t already have a domain name (like www.mydomain.com) or have been considering changing it, selecting the right domain name can be very important. You’ll want your domain to reflect what your business does, and if at all possible include one or more of your targeted keywords.
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