Backlinks (or back-links [UK]) are incoming links to a website or web page. Inbound links were originally important (prior to the emergence of search engines) as a primary means of web navigation; today their significance lies in search engine optimization (SEO).
backlink is considered as vots from the se point of view. for the regular user it is navigation way. the more backlink the more votes and higher ranking
This trick is based on optimization of the page, but you can not really get a reasonable amount of backlinks if you expect your site to be recognized for their content. you still have to work for it to link promotions.
Back links are hypertexted pointers from other sites pointing to your website. Indeed, google considers backlinking as a way to recognize popularity of your site. More links means better page ranking and higher traffic from search engines.
You can build backlinks by bookmarking your article with social bookmarking sites such as digg, mixx etc and many others. this will give you higher PR.
For me Backlinks is one of more relevats parts of the SEO. You can make some Forum posting, and Blog posting for best SEO. Kiss
Backlinks are simply links pointing back to your site, as in you write an article and submit it to the top article directories in your niche, they usually allow you to put a link back (same thing as backlink) to your site in your signature, the search engines see it, and associate that backlink and the keywords with your site, so when someone searches for that keyword, your site will be one of the potential candidates shown (well as long as it has enough backlinks, authority, age of site and backlinks, and several other factors Google et al don't want to reveal)
i think der is lots of threads in DP for backlinks and even for how to get this backlinks with top sites...
Backlinks are basically an integral part of off page SEO. They can give your website credibility. When obtaining backlinks make sure that you use, anchortext, this means using your keyword. For example: <a href="your website"> keyword </a>. This means that search engines will associate your url, whether main page or internal page, with that particular keyword. Also try to get geo targeted links, if aiming at the US market, try to get links from US hosted and registered websites, ideally relevant to your niche. If looking at the UK market, then see my signature link..
After on-site optimization for any website the off-site optimization work starts which consist completely of making more and more backlink for the website which helps in achieving ranking in search engine results through targeted keywords.
A back link is an inward link to your site that may or may not be reciprocated with an outward link back. If page A links to page B then a back link would be a link which goes from page B back to page A.
You can check some Link Related Topics, such as internal link, external link, page authority, Trust and etc, google search seomoz knowledge center (i cant submit link now, heh)
back links can be increased by forum posting, directory submission, blog comement etc........ but consider taking quality back links....