Istikhara is done to know if you should do something after you have taken a firm decision about something - like a job/ marriage / purchasing a home. If your istikhara is done correctly, your answer is already given. Istikhara helps you confirm with Allah if your decision is correct or wrong for you.is done to know if you should do something after you have taken a firm decision about something - like a job/ marriage / purchasing a home. If your istikhara is done correctly, your answer is already given. Istikhara helps you confirm with Allah if your decision is correct or wrong for you.