edit 2: actually, this link https://bitcointalk.org/index.php?board=52.0 doesn't point to a specific area do you have one more specific ? On how one can learn about this more.
The Bitcoin Black Friday signature campaign thread which I am participating in is here.
https://bitcointalksearch.org/topic/bitcoinblackfridayinfo-signature-campaign-high-payouts-every-2-days-open-1253069
This is a thread that lists most of the best signature campaigns currently active on Bitcointalk.
https://bitcointalksearch.org/topic/overview-of-bitcointalk-signature-ad-campaigns-last-update-01-jan-23-615953
This is a thread where people sell signature designs for signature campaigns.
https://bitcointalksearch.org/topic/bb-code-design-for-bitcointalk-signature-campaign-70-contest-799618
In it you find this quote explaining what each rank of Bitcointalk member is allowed to put in their signature. Basically the higher the member rank, the better the signature is permitted to be,
- Member: Unlimited length.
- Full: Color allowed.
- Sr. Member: Size allowed
- Hero: Background color allowed