I am quite aware about what SEO impressions are: i.e. number of times your site result are listed in the Google search results. But are the impressions are counted if they are visible at least once in user's viewport or just if Google has thrown them to the user in its search list?
For example assume a result that is at rank 7-10 which is not even in user's viewport. User clicks on result 1 and has not even viewed my result. In this case, does Google track this as impression?
Is this data available in webmaster report, so that we can get a better estimate of our CTR?
Something like :
Total Impressions : 10000
Impressions Viewed (some other meaningful name) : 5000
Clicks : 500
CTR overall : 5%
CTR/viewed results : 10%
This data could be really helpful and provide better insights.