Use labels-Email

Use labels

Adding labels can help you to isolate specific emails. To create a label:

Click the Settings link in the top right-hand corner
Click the Labels link
In the Create a new label field, enter an appropriate name (for example, Mum), and then click the Create button
Now you can apply the label to an email by clicking the check box next to it, clicking on the More Actions drop down box and selecting the new label. You can also remove labels the same way, and can apply multiple labels to the one email
Labels are added to a box on the left-hand side. Click on a label's link to show only the emails marked with that label