denleyderek

Forum signature is one of an essential part of search engine optimization.

social bookmarking and directory submission both

Its a good question and all the above answers are right for getting high ranking in Google

Manually as well as use software and submit your site high PR social bookmarking sites

It is not a good practice

If you search on Google you find there so many links about Angela back link packets high page ranks

One web page which cache by Google may be not index in Google database

Increase web traffic of your site by ethical seo is called white hat search engine optimization