HAVE + object + past participle

This structure is generally used when we talk about professional services provided for a customer. It means that we are not doing something ourselves but arranging for someone to do it for us:

I had my hair cut this morning. (A hairdresser cut my hair.)
I'm going to have my apartment painted. (I'm going to ask someone to paint my apartment.)

Compare:

I cut my hair this morning. (I did it myself.)
I'm going to paint my apartment. (I'm going to do it myself.)

Have + object + past participle is different from have/has + past participle (present perfect tense) and had + past participle (past perfect tense):

I had my hair cut. (causative: have + object + past participle)
I had cut my hair. (past perfect tense: had + past participle)

In this structure, have is not an auxiliary but a main verb and can be used in the same way as ordinary verbs:

I'd like to have my photo taken.
Could you have this jacket cleaned?
When are you having the heater installed?
Have you ever had your ears pierced?

Have + object + past participle can also have the non-causative meaning "experience something unpleasant". In this case, the subject of the sentence did not initiate the action:

I had my bike stolen. (My bike was stolen.)
He had his leg broken in a car crash. (His leg was broken in a car crash.)