Never use flashing text or icons, they are distracting to the reader and may prompt them to leave a page/site prematurely
Do not use clip art or photos to decorate your web page; images should be limited to graphics/photos that inform or illustrate the content (schools are more at liberty to use clip art/photos, but should still try to be careful not to overuse graphics and to also use high-quality graphics as explained below.)
If you have two or more photos from an event that you want to share, it is best to place those photos in an image gallery rather than placing/embedding the photos throughout the layout of your page or website; remember, photos should inform the content and should not be merely decorative.
Official department or program logos can be used on web pages, but should be used sparingly (not on more than 1 or 2 pages). For example, a logo could be placed on a department’s home page or page where the content directly relates to the logo.