@Somila, it's a personal decision, of course. I'm just explaining why, from where I stand, it can seem distasteful. Whenever we post anything, everyone can see the line "Professional Teacher" or "Community Tutor" next to our photo. They can click on our profile if they want to check out our lessons. That's why I don't see a need to mention I'm a teacher (it's obvious) and why I have never booked a lesson with a teacher who constantly reminds everyone they're selling lessons.
In my experience, many new teachers and some community members assume incorrectly that Discussions is a great way to gain many students. The vast majority of teachers whose schedules are consistently full have never written a single post in the community section. In my experience, most students find your profile through the search function, not through Discussions. If a teacher is posting in Discussions in the hopes of dramatically increasing their number of students, it's highly unlikely to happen. A few here and there, but one's efforts are best spent on one's profile. They should use the Discussions if they really are interested in them.