question about admob ?

hi guys, i am using admob right now in my application , and i have technique that i am following to get highest revenue and i want someone to tell me (from experts of course) if that right or not , and if not what is the best way to get highest revenue , i noticed in all of my application and period of using admob that impressions must be very close to clicks to get more good revenue , is that right or not ? what i made in my application that i request admob banner only one time during session of application , and i disabled refresh ads feature from admob account , in this way i decreased the number of impression , is this technique good or not ?
thx in advance sorry bad english

Your revenue equal to the number of clicks multiplied by its price. Other indicators are secondary. You can reduce your ad impressions and increase performance, but revenue does not change as number of clicks will be unchanged.