WHAT ARE BANNER AD'?
Banner are rectangular advertisements blocks with the size from 320*60 to 480*90 it can .jpeg .jpg .gif and .png E.g
HOW TO BUY ?
Banner ad's cost 5.99/month, send money through you preferd payment option after your payment is done copy your transaction id-(from where you paid) and this code -BANMOB480JP and submit it on the submit form and your ads will be active within 24 hours.
WHERE WILL YOUR ADS BE SHOWN ?
It depends on what ads banner/ ads you bought if its banner ads it will appear in top of the app.
example screenshot: