1) Using a non-chrome browser to access gmail? At least once a week get a popup telling me the experience is better in Chrome and I should switch.
2) Not logged into google in safari on my phone. During a routine google search, telling me with a modal to login to improve the search experience.
Its exhausting and I started backing away from google because of it. Ok, tell me once or maybe tell me every few months thats fine...but every week the same darn message. Too much.