To have something done means we don't do the job ourselves but we ask someone to do it for us. Usually, we use this special passive construction to speak about paid services, like hairdressing, cleaning, medicine, car service centres and so on.
Theresa had her hair cut. She didn't cut her hair herself, she went to the hairdresser.
John is going to have his car serviced. He isn't servicing it himself, he is taking it to the garage.
How often do you have your apartment cleaned? How often do you use cleaning services?
The grammar of "have something done"
have + object + past participle
You can put have into any tense, make question sentences or use it with the modal verbs.
I can't speak. I'm having my hair washed.
I've just had this jacket cleaned, and now it's dirty again.
You should have this socket repaired at last.
The main verb (the past participle) goes after the object. Be careful with the word order!
Our neighbours are having a new house built.
If I have this coat altered a bit, it'll look really nice.
You can also use get instead of have. The meaning will be the same but "get something done" is less formal.
Helen got her hair dyed pink. = had her hair dyed pink
We get sushi delivered if we don't feel like going out. = have sushi delivered
Have something done in a negative sense
We can use "have something done" to say that something bad was done to somebody by another person.
Jeremy had his wallet stolen. His wallet was stolen.
Claude has his nose broken when he was playing volleyball. His nose was broken.
The company had its equipment confiscated. Its equipment was confiscated.