A question about emphatic reflexive pronouns

So I’ve taken a handful of Spanish classes over the years and I’ve always been told that you can add (otherwise unnecessary) reflexive pronouns to emphasize the meaning. Only recently have I begun to abandon textbooks and try to learn threw speaking with natives, and only now am I beginning to understand the emphatic reflexive pronoun, but I’d like to make sure that I’m correct.

“Comí las galletas” = “I ate the cookies”
“Me comí las galletas” = “I ate the cookies up”/“I devoured the cookies”

Is this a correct way to interpret this concept? Please give other examples!

submitted by /u/smithysmithens2112
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