@sourabhthaverJun 26.2014 — #Impression in seo means, when somebody search keyword in Google and click to one site. Then other site don't get click, they got only impression. They called impression.
@annabelle123Jun 26.2014 — #impression in google: No of times your website displayed in google search results when user search particular keyword. Its only display only not clicked the website.
Clicks in google: No of user clicked your site in a particular keyword.