The Cherry tomatoes are rounded tomatoes.  In addition, it is a cross breed between wild currant-type tomatoes and home garden tomatoes.

Cherry tomatoes range in size from a thumb tip up to the size of a golf ball. Also, they can range from being spherical to slightly oblong in shape. They are bite-size treats perfect for salads and skewers.

Why should you eat cherry tomatoes?
Cherry tomatoes are powerful sources of healthy nutrients.
Tomatoes are an excellent source of vitamins A, C and K, and potassium.
They have a high water content.
Good to pair with different veggies.
They are equally nutritious as beefsteak.
Good sources of daily fiber.
Can be eaten raw or cooked, to get the nutritional benefits.
Good for kids to eat.

Cherry tomatoes are good additions when paired with our home-grown lettuce . 
If you are wondering about the difference between grape and cherry tomatoes, get to know more here.