This logo is to depict adding an image and has a curvy picture frame with a smaller rectangle inside of it. There is a plus sign inside of that rectangle.
This Add Image icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,000 icons, all in the same style and quality.