The most important factors of SEO or search engine optimization is
INBOUND LINKS or BACK LINKS and Anchor text in inbound
links. YAHOO! and Google, like many other
search engines, puts a significant weight on the anchor text of inbound links.
What are inbound links or back links :-
When any website points to your site , this is called a " back link
" or " inbound link " to your site. More easily , when any website
places a hyperlink of your website in their site it is a back link for
your site. Back links will help your site to score higher in Google or
YAHOO! search
ranking.
Link text or Anchor text :-
The link text is the text displayed in a hyperlink, which ( hyperlink)
refers a webpage or other website. The target webpage's main search
term should be included in the link text. Try to include target page's
main search terms in this 'back link text' . Search terms are the
phrases for which we make a search . As for example Google PageRank
Algorithm. When some one searches for "Google PageRank Algorithm",
the website www.anysite.com can get a top search engine ranking due to
this back link. Generally many back links required for a top ranking.
The following incident may happen,
read carefully. The webpages not having a search term or keyword in
their web-page content may get top ranking for that search term or
keyword, and it happens.
Search Google for Advertisements. It may happen that the top ten
pages do not contain the word Advertisements in their webpages referred
by Google. This is totally due to the anchor text or link text of
inbound links / back links. The links pointing to the advertisement
website contains the word advertisements. So the webpages not having
the word "advertisements" in their web page content, get a high rank in
the websites for the search term advertisement.
The back links actually increases your website PageRank or PR. So the
back links help in high Search Engine Ranking in modern search engines
like GOOGLE YAHOO!.