Hi Cecelia Lopez - Typically the text you're seeing here is based off of the name of the top level space that is in your community. Generally it's recommended that this space is renamed to match the name of the community, since it is reused in the email templates.
You can update the name of the root space by going into Admin Console: Spaces > Management > Summary, and then editing the top most space.
You will also see this name come up when you publish a new piece of content. One of the bottom options is to publish the content to the entire community. If I name the top level space to "WowGroup", then you'll see an option to publish the content to "The WowGroup Community":
Let me know if this helps.
Sounds like the user will just need to refer to the subspace name listed as a hyperlink at the bottom of the email message and simply ignore the root name that appears on the top of the email message. As for renaming the main root space, that's on my list for review with our Steering Committee. Thanks.