? If your business has a group on Facebook, make use of this group to post specifics of the event along with the link to the registration
An important promotion tactic is email marketing. Inform your subscribers or email list about the upcoming webinar at least seven days before you go live.
? Show a short video:
Google+:

Webinars are an online presentation that helps in easily showcase your products and services to your target audience. It also enables the host to show their affiliate products in a more efficient and engaging way.
Content is the reason people register and attend your webinar, so without great content, either won�t get people to show up or you won�t get them to come back. Carefully select your topic/title/speaker based on your target audience�s interests and needs, as it relates to what your firm does. Generally speaking, webinars are intended to be educational�not �salesy��so be sure that you create content that your audience finds helpful and valuable.
×