The defining characteristic of feta cheese is that it is brined or pickled. The brining process gives feta cheese a salty, tangy flavor and a crumbly consistency.
Feta cheese can be served as a table cheese, used in baking savory dishes, or served as an appetizer or in salads. The classic Greek salad is made with Feta cheese. Feta cheese and spinach are often featured together in Greek recipes such as the traditional Spanakopita, which is a spinach and feta cheese pie baked in phyllo dough.
Feta cheese is usually sold packed in water or sometimes oil. Since feta will dry out if removed from the water for too long, it's a good idea to store it in the water it was packed in, or rinse it and store it in fresh water.