Office helps you find and create graphics to enliven your documents.
Clip art and pictures
Icons and 3D models (Office 365 and Office 2019 only)
There are new kinds of clip art for Office 365 subscribers:
Have your own vector graphics? See Work with SVG images for how to use them in Office.
Video: Draw shapes
Video: Format shapes
Draw or write with touch
Edit your Word document with natural gestures (Word for Office 365 only)
Animations in PowerPoint
Web sites where you can find pictures
Some web sites that offer free illustrations or photos: