We use Zoom across our organization as a video conferencing solution between our multiple offices and with our various business partners and vendors. Zoom enables users to share their screen, view multiple participants (sometimes), and it is integrated into our conference rooms, it is utilized on laptops and mobile devices.
Zoom has higher quality video streams than the competition and provides the ability to record meetings; however, Google Hangouts is more user-friendly and takes little to no training to be able to utilize all of its features (although there are fewer bells and whistles). GoToMeeting is the name most people know about, it's easy to use, but the UI and feature set feels very dated.
Zoom is great for a company that needs to collaboration with remote employees or across multiple offices. For a business that uses the Google suite of business apps, it can be very efficient since the Zoom Chrome extension makes scheduling meetings a breeze.