You need to separate the terms "burn fat/build muscle".
Will targetted exercise build muscle in that area?
Generally yes, if you use enough resistance and target the specific muscle. Like the common bicep curls will target your biceps.
I'd recommend compound exercises though if you are just starting up as compared to isolation exercises.
Will targetted exercises burn fat in that area?
Generally no. If you want to drop your bodyfat %, it applies overall throughout your body.
That is why they say abs are built in the kitchen, not in the gym. If this is your target, get a good diet which meets your goals and make time for some cardio.
Hmmm.. yeah okay i think i get it now. I think for my goals it's best to work on compound exercises and diet like you've said.