KITAP is a permanent stay permit, which is quite difficult to obtain but provides enormous benefits to foreigners who wish to establish their livelihood in Indonesia.
You can only apply for a KITAP once you have obtained a KITAS (limited stay permit) and had extended the latter multiple times. Unlike any other stay permits in Indonesia, the KITAP is valid for five years. If after five years there are no changes to the status of the expat, the visa is extended automatically; you need to apply for a new card.