What is Lasso tool?
The Lasso tool is helpful for drawing a free-form border around a selected object within an image. It allows you to soften the edges of your selection or add a feathering effect; it's also useful for anti-aliasing.
Lasso tool in Photoshop is used to select areas with no pre-defined shape. It is a common tool available in all image editing software and enables free selection of area. The three types of lasso tools are Standard lasso tool, Polygonal Lasso tool, and magnetic lasso tool.