While crawling, web spiders will look for text on the site that is related to the search query. Hence, provide text relevant to products or services offered. The title tags, meta descriptions and keywords per page have to be unique and relevant. Provide keyword rich site content on relevant topics, as spiders judge your site based on these things.

Specify the site URL ( http://www.example.com/) that you prefer for your site and redirect the rest of relevant website URLs like www.example.com/index.html, http://example.com, example.com/home.asp etc to the preferred site URL by adding the 301 redirect (permanent) to the preferred URL, so that user entering relevant website URLs will be directed to your main site page.

Provide breadcrumb trail which is a navigation aid that shows both search engines and humans where their current location is and how far they are from the destination page.

Use limited number of graphics, and if possible, avoid them. Provide relevant anchor text to the image links, as spiders can crawl only anchor text and not images. Also the site uploading time is directly proportional to number of graphics on site.

A website designed by calling JavaScript and CSS code externally is a good one. Stay away from frames as search engine avoids them, and restrict the usage of flash, QuickTime or other plug-ins on HTML Pages.

On the whole, it is necessary to prepare a site with simple navigation and architecture for assisting search engines to easily find information on your site.