Why do some Google Calendar event names contain HTML tags?

Sometimes, it can be confusing to see if a title on Notion has HTML tags, such as the bold tag <b>.

If you are copying the text from another site or document, you may be pasting and applying the same format of the source to the Notion event title without knowing it. That's why the synced Google Calendar event title will be displayed with HTML tags.

To avoid this, use Ctrl + Shift + V on Windows or Shift + Option + Command + V on a Mac to do a "clean paste" on Notion titles rather than Ctrl + V or Command + V.