Precision marketing is when companies use very specific information to figure out what type of advertising or marketing would be most appealing to a certain group of people.
Imagine you have a toy store and you want to sell more toys. Precision marketing means you use information about the age, interests, and preferences of kids to figure out what types of toys they might like. For example, you might show advertisements for superhero action figures to boys who love action movies and video games, and ads for dolls and dress-up clothes to girls who love tea parties and princesses.
By using this information to tailor your advertising, you can make your messages more effective and get more people to buy your products. It's sort of like making a custom playlist of your favorite songs: you're picking and choosing exactly what you like, instead of just listening to whatever comes on the radio.