Email is by far the best option to send thank you notes and reminders to the person who signs up for the webinar. Set an email automation for those who sign up for the webinar, add your product benefits in the email and give them a little introduction about what you are going to serve them during the webinar. Also, email is the way to make your prospect feel important
? You can invite people manually using the Invite more button under the Viewers section, which can be found at the bottom right of the page.
It is really difficult to get an audience to be a part of your webinar. You always need to look for a topic from your niche that is trending to be able to capture the attention of a large audience. Do some research and look for customer problems. Be relevant and informative with your webinar topic to encourage more people to attend your webinar.