to enhance - to make better / to improve / to surpass His English skills have enhanced over time.

You can enhance your experience, performance, capabilities, etc... generally, it means to make better / improve.

1.You can enhance the flavor of the dish by using herbs. 2.The company is looking to enhance their earnings. 3.The photographer enhanced the image to show more detail.

I agree, it's a word that's used in writing and presentations, or in advertising, not in conversation.

A tour guide says, "You can enhance your vacation experience on the island by attending the luau." Using a good camera will enhance the quality of your photographs. I will add music to enhance my video presentation. The designer enhances the wedding gown with small pearls and extra lace at the waistline of the dress.