Setting a Region's Anchor Point
Every Region has an Anchor that serves as a temporal reference point, or the point Logic uses to snap the Region to the Arrange window's time grid. The resolution of this time grid changes depending on the Arrange window's zoom level, but at all resolutions the time grid's function is the same: It's there to ensure that the Region's Anchor always snaps to a bar or beat position (or division and tick, if you're zoomed in close enough), which in turn lets you confidently move Audio Regions around the Arrange window, safe in the knowledge that no matter where you move a Region, it will always play in rhythm with the other Objects in your song.
In the Audio window, the Anchor is represented by a small triangle under the Region. When a Region is created, an Anchor is automatically placed at its start boundary, but you're free to place the Anchor anywhere you'd like within the Region. For Regions like the HH loop, it's fine to have the Anchor right at the Region's beginning, because the Region starts on the downbeat of a drum loop. But Regions like Snare present a bit more of a challenge. This Region does not begin on a downbeat, but rather begins with a bit of sound that leads into a Snare hit. To ensure this Region lines up correctly with other Arrange window Objects, you should adjust the Anchor so that it falls directly on the peak of the Snare hit.
As you move Regions in the Arrange window, the help tags actually show you the position of the Anchor, and not the Region's start boundary.