Weird symbol in my slider control

I keep getting a weird symbol on my controllers (is a circle with red, blue and green) don’t know what it is or why it appears. Does anybody knows?

Screenshot 2024-01-07 163517

You can display the trajectory of a motion path when you select an object from any view it can be selected in.

From the top menu, select View > Show > Control or press Shift + F11 or in the Camera view toolbar, click on the Show Control button.