I never thought buttons on either side of the mouse wheel would be so useful. Now I can't imagine using a mouse without it. (More about the key binds in the comments) :
Windows 11 Mouse Middle Button Magic With App Icons In Taskbar HTMD Blog
Scroll wheel/middle mouse button does not seem to work | across | Community
Logitech's MX Master 3 scroll wheel is focused hardware at its best - The Verge
Logitech Pop Mouse review: Emoji button meets colorful simplicity | Ars Technica