What is this

[JonMayo]

Hey guys any idea what this is I having driving on some of my rocks.

 

[lapin]

Looks like a macro algae

 

[AlSimmons]

Dictyota I believe.

 

[JonMayo]

Would this be considered good or bad?

 

[mcgyvr]

Would this be considered good or bad?

You pick that answer...
Some people like to have some macro algae in their display tanks.. Others don't..
That kind typically won't get out of control and is easy to manage..