Through the webmaster guidelines of Google can be derived even some details about search engine optimization. Each side should be accessible through a link, Google says in the guidelines. Creating a sitemap is also of great importance.
A well structured website is easier to index for the world's largest search engine, as a website with confusing structure. The Google crawler does web pages easier to read and absorb in the index, if a site map is available.
Advantages for the evaluation and ranking of a website can make a HTML sitemap. When each reached base with two clicks within a site is, the bases rather Google's index are included. Does the crawler can find several ways, it is possible that sub-pages are not included in the index. TITLE tags and ALT attributes should be meaningful, according to the guidelines laid out. These can be defined by images.