Are you going to design or redesign new website or thinking for it, then first read below given points, which google likes in a website, Google Information for Webmasters.
There are more than 80 factors of your website that are taken into consideration when determining the ranking of your website, Following these guidelines will help Google find, index, and rank your site.
Basic principles:
1) Make pages for users, not for search engines. Don't deceive your users or present different content to search engines than you display to users, which is commonly referred to as "cloaking."
2) Avoid tricks intended to improve search engine rankings. A good rule of thumb is whether you'd feel comfortable explaining what you've done to a website that competes with you. Another useful test is to ask, "Does this help my users? Would I do this if search engines didn't exist?"
3) Don't participate in link schemes designed to increase your site's ranking or PageRank. In particular, avoid links to web spammers or "bad neighborhoods" on the web, as your own ranking may be affected adversely by those links.
4) Don't use unauthorized computer programs to submit pages, check rankings, etc. Such programs consume computing resources and violate our Terms of Service. Google does not recommend the use of products such as WebPosition Gold™ that send automatic or programmatic queries to Google.
Design and Content Guidelines
1) Make a site with a clear hierarchy and text links. Every page should be reachable from at least one static text link.
2) Offer a site map to your users with links that point to the important parts of your site. If the site map is larger than 100 or so links, you may want to break the site map into separate pages.
3) Create a useful, information-rich site, and write pages that clearly and accurately describe your content.
4) Think about the words users would type to find your pages, and make sure that your site actually includes those words within it.
5) Try to use text instead of images to display important names, content, or links. The Google crawler doesn't recognize text contained in images.
6) Make sure that your TITLE and ALT tags are descriptive and accurate.
7) Check for broken links and correct HTML.
8) If you decide to use dynamic pages (i.e., the URL contains a "?" character), be aware that not every search engine spider crawls dynamic pages as well as static pages. It helps to keep the parameters short and the number of them few.
9) Keep the links on a given page to a reasonable number (fewer than 100).
Specific recommendations
Avoid hidden text or hidden links.
Don't employ cloaking or sneaky redirects.
Don't send automated queries to Google.
Don't load pages with irrelevant words.
Don't create multiple pages, subdomains, or domains with substantially duplicate content.
Avoid "doorway" pages created just for search engines, or other "cookie cutter" approaches such as affiliate programs with little or no original content.
for more details Please visit below given links.
http://www.google.com/webmasters/index.html
http://www.google.com/webmasters/facts.html
http://www.google.com/webmasters/seo.html
http://www.google.com/webmasters/bot.html
http://www.google.com/webmasters/remove.html
