If you are running a website OR want to start your own web business, then you need send your offers & discount to your customers. In this way email campaign is best proof marketing strategy to boost your sales. MailChimp is the best email marketing services & an american company founded in 2001.
After login in Mailchimp click on lists menu bar and then click on Create List on top right bar. See below screen shots.
Below is the create list form. Fill out all required fields and click on Save button.
After successful creation of list you will be redirected to the next page and on that page you will see the below screen.
Click on Next button after selected CSV or tab-delimited text file.
Select your CSV file and click on Next button.
To import all subscriber click on import button.
Now you have imported all subscribers and you are redirected to subscriber listing page.