My concentration is constantly broken by the need to check messages.

I’m running into a problem where I can’t get into deep work on campaigns because I’m always checking emails and messages. I’m worried about missing something important from a client, so I keep notifications on but that ends up breaking my concentration every few minutes.For those of you managing multiple clients or accounts, how do you balance being responsive with actually protecting time for focused marketing work? Any tools, habits, or boundaries that work for you?