Many of these anime art is of three dimensional also known as 3D and two dimensional also known as 2D and many will be still pictures. They will probably be of famous anime cartoon characters that you already know and some of who you don't. The art might be confusing at first because you know that they are Japanese and strangely they look more of western than Asian. With their blue eyes and yellow or orange hair the cartoons and pictures resemble more of the western look than those of the Japanese.
What always gets me however is the clothes they wear and the surroundings visualized in the cartoons. They are usually of the early days of Japanese history with Ninja's and Samurai's being key figures in the cartoon series and the manga comics as well. You will also find the manga comics and the anime cartoons play important key roles in the art of anime.