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Declare the language in use can help search engine to better understand and rendering your page, especially when special characters are encountered.

Site speed is becoming an crucial ranking factor. Slow page loading is one of the biggest complains of web users. If the loading time is too long, you may need to check your server, network, or system codes and structure.

Tips:
1. ideal loading time is less than 1 seconds, if it take more than 5 seconds to load your site, likely users will run out of patience, so do search engines.
2. improve your SEO by optimizing your website to have a small size and faster responding server.

Flash content can not be properly indexed by search engines, and normally flash file is large in size, which slow down the loading of your page.

Tips:
1. avoid flash content whenever possible if you wish to have a fast and SEO friendly website.

Framesets and individual frames could cause problem for search engine to crawl your pages

Tips:
1. avoid frames whenever possible.
2. search engines do not like frames.
3. use iframe instead if you really have no choice.

nested tables could slow down page rendering and lead to bad user experience.

Tips:
1. avoiding <table> for your page layout.
2. using <div> instead of <table>.

Search Engines treat URLs with or without "www" as two different records.

Tips:
1. edit your .htaccess file and permanently redirect one to the other (eg redirect www.mysite.com to mysite.com).

clean, short and relevant URLs are favoured by users and search engines

Tips:
1. use url rewrite to turn dynamic pages with query parameters into seo friendly static pages.
2. put your important keywords in the url.
3. good urls are not only user friendly but also seo friendly.

search engines cannot `see` images, proper Alt content will help them to better understand and index images.

Tips:
1. always add alt attributes to images. Alt is mandatory for accessibility and for valid XHTML.
2. words used within an image`s Alt attribute should be its text equivalent and convey the same information.
3. use a human-readable caption and descriptive text around the image.

put scripts together and link them from an external files rather then put them in the same file as the main page.

Tips:
1. reduce the use of in-page scripts, put them in separate files and link them in.
2. reduce the number of external script files, it will help browser to make lesser number of http requests from the server.
3. optimize or compress the script files to have smaller size and faster loading.

Having a blog is a great way to provide fresh content and retain users, search engines favour it too.


Tips:
1. regularly update your blog and provide fresh and quality content.
2. relevant blogs of your website topics, generate more credits in the eyes of your visitors, as well as search engines.

Users are concerned about the safety of their online transactions. Trustworthiness rating is based on real user ratings and that tells you how much other users trust this site, so do the serch engines. note: this trustworthiness score is provided by WOT (Web of Trust).

Tips:
1. pay attention to the look and design of your site, many people look for visual cues when assessing a site`s credibility
2. make your site easy to use, sites that are easy to navigate are perceived as being more trustworthy.
3. make it easy for user to contact you, users will be more comfortable and feel more secured shall they need to get in touch with you.

Ensure that your site is malware free and does not cause harm to users` computers.

Tips:
1. do not put virus, malicious worms, adwares, trojans, spywares and suspicious phishing code in your server.
2. take suspicious behaviours seriously, have a regular check-up and monitor closely of your server`s log files.
3. if your site is black-listed by Google as suspicious, clean it up before requesting for a review.

Too many domains hosted on the same server is an indicator that you are not really serious about your website, and your site will have a higher chance to be surrounded by bad neighbours.

Tips:
1. the fewer domains hosted on the same server/ip the better.
2. avoid shared hosting whenever possible, especially when there are already hundreds or thousands of sites are hosted on the same server.
3. dedicated ip or resources for your site not only do good to your site visitors but also favoured by search engines.

A secure and safe server is not only good for your site visitors but also good for search engines.

Tips:
1. server software version information can be utilized by malicious visitors to attack your server.
2. by turning off the server signature, you actually have made your server a little bit more secure.
3. for Apache server - edit the apache2.conf or the .htaccess file to turn server signature off.

domain name choice and domain age are crucial for SEO.

Tips:
1. keep the domain name short and relevant to the content, which will be easier to be remembered and related to.
2. older domain tends to be more trustworthy.
3. register a domain for more than 1 year, and search engine will think it is a serious business.