Do not parrot such stupid advice as “Active 24/7”.
Are YOU active 24/7? Do YOU sleep? I would hope so, otherwise, you may end up having a psychotic episode.
There is NO way a seller (one who is not a member of some team of people) can be online 24/7. AND if YOU do appear online 24/7 because you are using a browser refresh extension, expect your account to receive a warning and possibly be suspended.
STOP giving advice if you have NO idea what the heck you are talking about. Newbies tend to listen to anything here.