Alerts are an extension of Markdown used to emphasize critical information. On GitHub, they are displayed with distinctive colors and icons to indicate the importance of the content.
An example of all five types:
Note
Highlights information that users should take into account, even when skimming.
Tip
Optional information to help a user be more successful.
Important
Crucial information necessary for users to succeed.
Warning
Critical content demanding immediate user attention due to potential risks.
Caution
Negative potential consequences of an action.