This is a picture of an arrow than is pointing to the left side. the arrow has two sides altogether. it is trying to show that it is less than something else.
This Less Than 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 5,700 icons, all in the same style and quality.