Service may be terminated or restricted for excessive roaming.
This is NOT required.
The free version allows you to conference call with up to 25 people at once.
For some businesses, this is absolutely essential.
Chat relating to posted media is fine.
There are also many integrations including WordPress, Slack, MailChimp, Facebook, Google Adsense, Twitter, Amazon S3, Twilio, and loads more.
Moreover, the simple and straightforward interface is suitable for beginners.
Pasting a Google Doc link automatically changes permissions, so everyone in the room can open it.