Circled and bubble characters are popular for quiz posts, event announcements and kids' content. They are ordinary unicode, not images, so they scale cleanly and remain selectable.
A Fancy Text Generator lets you preview the whole sentence rather than guessing at individual characters. That matters because some letters have no circled equivalent and fall back to plain text.
Keep bubble text to short phrases, and never put important instructions in it.
Written by FontStyle - more at fontstyle.io.