Subscription by email is one way to have more traffic. The subscribers can update if a new post is published in your site or blog site. As long as they interested to read they click the link in the subscription receive in their email.
Here's the step in putting or setting up the subscription form for your visitors and readers.
1. Sign up in Google Feedburner.
2. After confirmation, Log-in to your Feedburner Account.
3. In the Home of your Feedburner Account, you will see this screenshot.
It will look like this.
When You see like this.
Then Go to Publicize Tab and click Email subscription. Then click the Activate button.
Arrange the gadget if you desire to change its location.