In this video I have explained about lasso tool and its elements in detail.
The shortcut commend of lasso tool is L. There are 3 options available in lasso tool
1 lasso tool 2- Polygon lasso tool , 3- Magnetic lasso tool


Also Watch Complete Photoshop Guide
Lesson 1- https://youtu.be/YZ5URKNLPuc?feature=shared
Lesson 2- https://youtu.be/Hf9J44cMnUE?feature=shared
Lesson 3- https://youtu.be/wsYTAwU_7mk?feature=shared
Lesson 4- https://youtu.be/fIfUfQw6nz4?feature=shared