What sickness does flucloxacillin cure?

Can you tell me what specific illness or infection flucloxacillin is used to treat? I understand it's a type of antibiotic, but I'm curious about the specific bacterial infections it targets and how it works to cure those conditions. Is it commonly prescribed for a wide range of infections, or is it more specialized for certain types of bacteria? Additionally, what are some potential side effects or interactions I should be aware of if I'm prescribed flucloxacillin?