Area is the size of the surface of the object or the total amount of space that the object covers.
For a rectangle or a square, the area can be found by multiplying the length or height by its width.
Area = Length x Width
You are buying a tablecloth for your table. You want to know the size of the surface of the table so that you make sure you get one big enough.
Your parents are getting their driveway paved. You measure the driveway for them to find out how much pavement they will need to cover the whole driveway.Area = 50ft x 20ft = 1000 sq ft