if you doing invert tricks or whatever. do u recoomend keepong the fins on your board? what are some pros and cons?

unless your doing sliders or practicing alot of surface tricks i'd say keep your fins on

Some boards have molded fins and it allows them to track well without the center fin. It will ride like a normal board just looser. Fins provide tracking and that is good. Unless you are advanced and have great control & a board with molded fins I'd leave the things on there.

im fine at riding it and carving but is there advatages when you land the trick with fins on?

depends on the trick, if you have plenty of control finless then why switch? Fins can have a tendency to straighten you out too fast and a finless board is able to slide into position easier, on the flipside this can work against you too.