Wetting the brush is like how he said getting it damp.
Which is good to do before using a wash,I notice when I dip a bone dry brush in wash it sucks up all the way to the metal.
Quick tips see the metal collar(ferrule) that hold the bristles on.
Never let paint touch that,if it does rinse your brush immedately.
If paint drys in there it stops the brush from getting a good point
A wash the brush with brush soap or shampoo after the session.
You stick to that rule your paintbrush will last a couple years as opposed to a couple months.
Any other tips feel free to
PM me, if you want to hide youyr Noobieness
Happy Painting,Enjoy the Hobby