When you say graphics do you mean infographics?
I have an old friend who makes these and I was thinking about having some of these on some of my blog posts.
Yes, graphics means any kind of graphical data, whether images, graphs, infographics, memes, pictographs, and so on. If you include them in your blogs or websites, you're providing viewers with visual interactivity. They're likely to interact more with your pages. They'll return for more if you include appropriate materials. And always be careful on the side of usage, never use too many images if the main focus of your pages is to provide useful information and not to provide visual interactions. Even when selling products or services, it becomes indispensable to use more of images and less of textual data. It's still better to balance it out just to be on the safe side, however.