Click on this gear.
Then this message will come out.
Click and this will come out, where it says Labels.
Then you can create a label, put the name you need, I have 3 as an example which are: Com. Clase (Classmates), Institute and Teachers. You can also put which people or companies you want to have the label when you receive a gmail.
Then they appear in the bottom left of Gmail, and only the messages that have the label you clicked on appear.
