Comments like "Your gallery is amazing!" without liking a photo -> Have you ever received a comment like this: praising your gallery, but someone didn't like your photo, and maybe uk number for whatsapp even didn't like the comment on The above also applies to such comments.
A large change in the number of followers or the number of people they follow —> Usually, bots will also unfollow someone after following them for a day (or at most a few days). Therefore, keeping a few days of control on the followers of a profile can be an excellent way to know if they use a bot: if there is a turnover of hundreds of people per day, then they are almost certainly using a bot.