No, not quite. It also preserves your existing Journal entry. It also uses a different template which specifies that this tiddler is a Journal, and typically uses a special date format.
What that means is that throughout the day, as you’re visiting various tiddlers, you can update your existing journal entry, and at the same time create tags that will make navigating back to those original topics easy. Of course, you could have used links to those topics, which is the approach you would use with “Stroll”, for instance.
But tagging is also a legitimate and powerful way to connect information. And tagging, as opposed to linking, comes with a built-in mechanism for updating tags when you change titles.
It’s often the case that you use a Journal as a summary of events of the day, but then use tags to navigate back to the details.
For instance, if you ordered a new keyboard, you might use “New Journal Here” on top of the receipt, so that when reviewing the events of the day you could quickly go back to the receipt.