What tooltip text should I give to controls that move a map?

1. Should tooltips be hover or click?
2. What is the text displayed as a tooltip?
3. Should buttons have tooltips?

Should tooltips be hover or click?

Support both mouse and keyboard hover.

Tooltips that appear only on mouse hover are inaccessible for users that rely on keyboards to navigate. Be inclusive in your design and ensure that your tooltips are accessible via keyboards.

What is the text displayed as a tooltip?

A tooltip is a small descriptive message that appears near a view when users long press the view or hover their mouse over it. This is useful when your app uses an icon to represent an action or piece of information to save space in the layout.

Should buttons have tooltips?

If you're introducing the button as a new element & needs to draw users' attention you should use tooltip. It will help users to learn. *If the button explains itself clearly, we should not use tooltip.