Witness play a main role in steemit blockchain. They give life to our posts.
Steemit.com is a social blogging platform powered by a decentralized blockchain called Steem. The Steem blockchain produces blocks in 63-second rounds: 21 blocks per round at a target of 3 seconds between blocks. A decentralized blockchain needs a varied set of people running computers to create these blocks. There are many solutions to this, and Steem uses a consensus mechanism called Delegated Proof of Stake, or DPOS.

In the DPOS system, what are called witnesses in Steem are delegated by the collective Steem Power-weighted witness approval votes from Steem accounts.

They play a good role in steemit, so we must support them. It is my support.