"Show, Don't Tell" is a phrase that gets misused a lot. It does not mean "use pictures instead of words," -- it was originally advice for prose! What it meant in prose writing was that instead of Telling the audience how to feel, you Show them the details and let them come to their own conclusions. So instead of saying "the house was spooky," telling your audience what to feel, you describe the creaking floorboards and such, and let them realise themselves that it's spooky.
Show, Don't Tell can be done with dialogue and words, as well. A spurned character can yell "I'm so angry with you for betraying me!" -- that's Telling --or that same character can yell "Well fine! Obviously you and Meghan are having such a great time, why don't you just hang out with HER!!" -- that second one is Showing. Instead of telling us the character is jealous, you've revealed it through the actions they take and the things they say, and let the audience realise for themselves "oh!! someone's jealous!"
Here's another example I use a lot, from another topic on exposition:
I think the best thing you can do with exposition is give it emotional weight, like that voting convo above (letting that info reveal something about a character's personality or choices) or at the very least, show that information impacting the character in the world they live in. Someone explaining that you become a pokemon trainer at 10 years old is less effective than a kid on his tenth birthday excited to finally get his first pokemon.
Another example I like a lot is Rocket Raccoon. We never see Rocket's backstory in the Guardians of the Galaxy movie, but once when he's drunk and in an argument with the others, he blurts out that "I didn't ask to be made!!" and rants about being "taken apart and put back together." He never mentions it again, and we don't have to see it.
It's INFINITELY better than a visual flashback to Rocket's creation would have been, even though the rant is more vague -- because there's an emotional reason he's screaming it at Peter, we care about that. Any time that you can use exposition to DO something else, to reveal something else about characters, it feels less like you stopped everything to explain. A bit of backstory shared with a PURPOSE -- a secret shared to bring a lover closer, a defense against an accusation -- isn't gonna feel like exposition. It's gonna feel more like an action.