Hello @LeahyK! Great question. I like how the event has a very clean layout and I can easily find information about the event, location, etc. What I would look into is your subject line for the invitation. The subject line is usually the first thing that your contacts see when your emails arrive in their inbox, even before the invitation and event page! We recommend keeping the subject line between five and eight words. For an event invitation, maybe put "Reserve your spot for our seminar" or if it's close to the event, put some urgency like "Only 10 spots left! Sign up today" or "Registration closing soon! Register now". You want to make your contacts act right away if they are interested.
Here are a few blog posts that I found with some helpful tips on how to create a great subject line: