Lemony, olivey, and salty are perfect for pasta sauces (Puttanesca to mention the most famous), salads, sandwiches, pizza, focaccia and on your entrees and canapes.
Capers are actually little flower buds. Flowers! Cool! (Caperberries are also a thing, too.) They come from a plant called a Finders Rose. Capers are extremely bitter when eaten right off the bush, so way back when, some genius decided to pickle them, indeed ancient Rome and Greek used the caper plant (leaves, buds and flowers) for medical uses.