This Overview 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 4,300 icons, all in the same style and quality.
This icon is a rectangle standing on end and is meant to represent a sheet of paper. There are various lines of differing lengths running horizontally across the rectangle. These are meant to represent writing or typing.