I don’t have a lot of experience with autocomplete and autocorrect. I don’t really like either, so I have both disabled on my phone. The only device of mine that has autocomplete and autocorrect is my laptop. Both functions are enabled on Google. I use these functions occasionally on Google when I can’t remember how to spell something or I’m searching for something that I have searched before. A few times Google has autocompleted when I didn’t want it to. Though autocorrect and autocomplete is annoying when I text or write in Microsoft, I find it mostly helpful with search engines.