Holding a live seminar can be quite expensive. You need to look for the perfect location accessible for everyone and handle the number of your expected attendees. With that, you might want to look for other alternatives that allow you to hold seminars but save you money at the same time. As such, a webinar is one of your best options.
MyOwnConference blog. Lifehacks, reviews, useful tips for preparing, holding and promoting webinars and video conferencing.