How are impressions generated . Can anyone explain me probably how are impressions generated .... are impressions something to do with keywords or it has some other formula
No of impressions simply means the no of times an ad is shown on a page. For ex: ad on top right above will +1 impression if you refresh this page.
if you have google adsense on your site, then every time one visitor visits your site means its one impression. in other words, every time your page with adsense loads, it serves one impression