My grout keeps cracking around my cabinets and tub/shower....?

If it's getting wet it's because it needs caulking, so yes, caulk with Dap Tub & Shower caulking. As to the cracking grout, grout is not flexible and repeated movement leads to the cracking (like cabinet doors and drawers shutting repeatedly). The caulking I specified is made to flex. Just make sure the area caulked is completely clean and dry prior to caulking installation.

at these areas of unlike surfaces there will be movement it is not necessarily a failure just the fact of expansion and contraction . around your tub use a tub and tile caulk that is made for wet areas clean the area make sure it is dry then caulk and for other areas that are more cosmetic you can get caulks that match the grout and remain flexible or just use the same caulk

Moisture is your problem. Remove the tiles in the area that the grout is cracking and repair the drywall behind it. Do not use greenboard. Use a quality tile backer.

yes use a good silicone sealer caulk

It sounds like ours did! It was getting wet.

we had to put up new tile and regrout.

iwas told to fill tub with water then chaulk,seems to work better for me goodluck

use a good sil.caulk. that is if the gap is not to wide.