You can add a Twitter feed to your blog using a widget that is available in the Jetpack suite of tools. If you have not activated Jetpack in your blog/site please follow these instructions.
1. Having activated Jetpack on your site, a Twitter Timeline widget will now be available which you can add to a sidebar on your blog/site
2. When the widget has been added to your sidebar – simply enter your twitter username where prompted, and then click the save button on the widget