The insert and delete tags are generally used in combination to show edits to text. At AFSC they may be used to show differences between 2 versions of statements, for example.

Tag Description
<ins> The <ins> tag defines text that has been inserted into a document.
<del> The <del> tag defines text that has been deleted from a document.

Example:

HTML Code Display
I went to <del>Edmonton</del> <ins>Calgary</ins> on the weekend. I went to Edmonton Calgary on the weekend.