Don't get victim of the "invalid impressions" AdSense ban - protect your AdSense account now!
I did a major redesign of my blog because i didn’t like the look, each time i make a design change, i always preview my blog to see how it look which was a normal thing to do, i never knew that i was generating invalid and false impressions.
One Infamous Practice That Easily Get Adsense Account Ban Or Disabled
TLDR: Just install ad blocker. No ads = no "invalid impressions".