You can use it any place you would use 'certainly' or 'without a doubt' or any place where you want to add emphasis. "He won the race? That is indeed good news!" "He is a good student indeed! He got all A's." You can use it to indicate mild surprise. "Charlie is quitting and starting a farm." "Indeed. I had no idea he was so dissatisfied." One note: 'Indeed' is somewhat old and you will seldom here it in spoken conversation any more. It does still appear in written English.