Well, if I am not mistaken, you are very familiar to this term. Actually graphics are those images used on website. They are designed by designers and posted on websites. There are many kinds of graphics such as 3D, motive graphics, cartoon...etc...
Well, if you want to to get good and nice graphics, you can go to google to do search if you don't have time and enough money. However, if you want to have professional graphics, you need your designers to do desgin for you. Have a look at our example.