Yes. To turn off notifications about popular posts on a specific board, you need to remove the bell from those boards from which you do not want to receive notifications. This can be done on the board pages. You will still receive notifications if this board gives a reward to your post, or if your post is removed from this board. To start receiving notifications about popular and pinned posts again, you need to click on the bell again. When joining a new board, the bell will automatically turn on.