I have already seen this similar question but my problem is not exactly same.
I noticed that with my main Google account, I do not see any ads on YouTube (although I don’t like seeing them, I am just curious) , while if I switch to incognito, ads do show up.
When I switched my Google account with another one, again ads showed up! So is it something to do with my Google account?
I use Google Chrome and I don’t have any extensions installed at the moment.