"from where on the web is this user arriving?". It's often used to gauge the success of advertising campaigns. It may contain "identifying information" in a sense, but it won't be "personal" as such.
This, for example "?ocid=msedgdhp" tells the server at the URL you're visiting that you came to their site by clicking something that appeared on the Microsoft EDGE browser homepage. So the OP clicked a link, went there, then copied the address from their URL bar and pasted it here. This makes it so that when any of the rest of us click that link they posted, MSN (and Google Analytics) thinks we also did the same. The MSN site can't tell that we did not, we "look" just like the OP did to that server (came to them FROM the same spot on the web).
Although the GUID there, the "&cvid=69b42ee0fde746bd8ee289258117a5a7" (the ampersand means "this is the next parameter I am passing to you, server!" ) parameter is a browser session ID which is unique to the OP's visit (it's not identifying of the OP, it's just a randomly-generated string). So MSN picks up that similarity when determining the UNIQUE visitor count. Basically if 10 of us click that link, MSN thinks "The OP visited 10 times in this browser session". Unique visitors are more valuable, but raw hits "count" in their numbers as well.
I only complain when I see "fbclid=", or similar codes from sources I disfavor (which also includes X) which tells the site you visit "I came here from a Facebook link". Facebook leverages "how many people come to your site from Facebook" to set advertising prices and such, so then when a bunch of us click that link it boosts FB's numbers, makes it look like FB is more successful in driving users to other businesses and increases their income (obviously EXTREMELY slightly, but fuck Zuck, am I right?)
May I henceforth be known as the revealer of mysteries 
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