Spot on

If you describe something as spot on, you are saying that it is an extremely accurate description or representation of something else.  Your analysis can be spot on.  Your impersonation could be spot on.  That tiger growl was spot on.

Example:  I really loved your presentation.  It was a spot on analysis of the Napoleonic wars. 

Possible Origins:

In colonial India, people enjoyed playing billiards.  After you’ve potted the red ball, it must be returned to its starting position.  The spot was marked on the table.  You would return the red ball to the correct spot.

In the center of a target there is a small area called the bullseye.  If something hits directly in the the center of the target, it is considered spot on, right on, or bang on: all of which are synonymous.

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Reference:
https://www.bbcamerica.com/anglophenia/2011/12/frasers-phrases-spot-on-bang-on-and-wicked-wizards
https://www.phrases.org.uk/bulletin_board/9/messages/525.html