Zoom is a video conferencing platform that can be used through a computer desktop or mobile app, and allows users to connect online for video conference meetings, webinars and live chat. (If you type Zoom.com in your web browser, the URL redirects you to Zoom's website at Zoom.us).
Zoom's appeal is that, even using the free version of the service, it gives people the capacity to bring together a large number of participants in one meeting. Only the host is required to set up an account with Zoom, and the access information can be easily distributed to people who may want to join the meeting.
Keep your desktop app up to date, so that any patches Zoom makes to security vulnerabilities are added to your device. If you want to be extra careful, use Zoom only on a mobile device, such as an iPad or an Android phone, because these versions go through review in the app stores.