I have a slight idea of what a Checksum is, but little about why I would need such a tag on a site. I see it a lot, implemented on news websites. For example on this article on Bloomberg, it has the following meta tag.
<meta name="checksum" content="cfdf99753af393dc63329d195d692609">
What's its significance? Why does the site need it? Who creates/issues/validates the string in the content? What does the site loose if it's not included?