It's used to:
* Indicate deleted text: This is common in editing and proofreading to show what has been removed.
* Mark text as incorrect or no longer relevant: Sometimes used in online discussions to highlight outdated information.
* Emphasize a point: Occasionally used for sarcasm or to draw attention to something, though this is less common than the other uses.
Example:
"The meeting is scheduled for ~~Tuesday~~ Wednesday at 2 pm."
This means the meeting was originally planned for Tuesday, but has been changed to Wednesday.
Note: The strikethrough symbol might not always be displayed correctly depending on the platform or software you are using.