What is impression CTR, Request RPM, Impression RPM in admob

I'm not getting this Impression CTR , Request RPM, Impression RPM. how this all is calculated? and what should I do for more estimated earnings.

does higher CTR increase earnings? will constantly showing ad in app (more impressions) will increase earnings?

Clicks/Impressions * 100 = Impressions CTR (Click through rate) (112/1471) * 100 = 7.6

Estimated Earnings/Requests * 1000 = Request RPM ( Revenue per thousand requests ) ( 6.82 % 2621 )* 1000 = 2.60

Estimated Earnings/Impressions * 1000 = Request RPM ( Revenue per thousand Impressions ) Similar to above but replace requests with impression value.

I think your CTR is already too high as compared to normal which is usually less than 2%. No, Higher CTR doesn't promise higher earnings. Its the CPC ( Cost per click) that matters.

Also, showing more impressions in an app will not increase your earnings. The ad placement should be very comfortable for the user to check it out. If you provide advertisements in a proper way. User might use your app often hereby increasing retention. Thereby increasing real impressions of ads.