Indefinite Leave to Remain is the way through which a person can get settled in the UK, but under different conditions and circumstances. But if you have an ILR or you are eligible to apply for it, then you should definitely get it as there are many advantages of it which are as:

ILR holders can apply for British Citizenship
Children born in the UK
People with ILR have access to public funds.
ILR holders have the right to stand in elections.