Add a "Subscribe to Newsletter" widget to your WordPress powered website.
If you already have v1 installed, a message will pop up in the admin area of your WordPress account informing you that a new version is available. Simply update from there.
If you don't already have v1, log into your WordPress account and follow these steps:
The plugin will appear as 'dotmailer' in your left-hand menu.
For more detailed information on installation, find it at (https://dotmailer.zendesk.com/entries/23228992-Using-the-dotMailer-WordPress-sign-up-form-plugin-v2#install)