Canon EOS 7D Mark II (G) Instruction Manual page 373

A total of up to 999 images of a given rating can be displayed. If there are
more than 999 images with a given rating, [###] will be displayed.
Taking Advantage of Ratings
With [32: Image jump w/6], you can display only images having the
specified rating.
With [32: Slide show], you can play back only images with a specific
rating.
With Digital Photo Professional (EOS software, p.537), you can select
only the image with a specific rating (still photos only).
With Windows 8.1, Windows 8, Windows 7, or Windows Vista, you can
see each file's rating as part of the file information display or in the
provided image viewer (still photos only).
Setting Ratings
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