Look at the things you should consider before organizing a webinar:
Try to make a convincing invitation to drive registration. Don't give them a reason to feel like your invitation is a corporate "fill in the blank" form. Target a specific segment and make a personal connection, so you can retain them longer.
Promotional webinars, if used efficiently, are the most effective tool for marketing your upcoming product. You can host promotional webinars that incorporate the pitch of your upcoming product or services.