Yes! You can add someone to a group if they text a keyword on the Keywords page. You can also add someone to a group when they text a keyword associated with a Series.
How do I add someone to a group via Keywords?
Under your Messaging menu, navigate to the Keywords tab.
Click Add Effects under the Keyword you want someone to text in to be added to a group.
Select the group people will be added to and click Create.
How do I add someone to a group via Keywords associated with a Series?
Under your Messaging menu, navigate to the Series tab. Click into the series you want someone to opt into to be added to a group.
Click Add Effects.
Select the group people will be added to, then click Create.
Learn about other Effects you can add.