I have to put the work in and try to learn to sign up for good websites I don't like spam so unless I can post at a forum its hard just to sign up for a link
I think backlinks signature is very good, it can support more ranking and signature links will be never deleted (except you break the rule of forums or web 2.0) so that backlinks will exist forever.
Signature links are type of back links that are usually used in forum posting. every forum site has its own criteria to generate signature links. like for instance some forum sites would require 25 replies and then they would allow you to use signature in your thread. Signatures are basically used to increase the volume of traffic to your site by posting quality replies
Participate actively. It will help other member to know about you. It will give you clicks as well as more business.
The main reason of signature link for getting instant traffic of a site. It makes back link as well but main focus is traffic.
If you provide real value in your threads, people will be interested to find out more about what you have to say on the subject and if your signature links are related to the subject of your threads, more likely people will visit your site. Also, these are free backlinks coming from high PR authority sites like Digital Point Forum.
Signature link is simply a backlink to your site. It will help in ranking because it is considered a vote to your link with the term you are using.
It's a good way to get your website off the charts if you ask me.. purchase some real high PR links, they're the ones that make a difference.