What US freelancers mean when they search for this
Almost always it means a specific frustration with international clients. A design contract with a studio in Amsterdam, a development retainer with a startup in Sao Paulo, an editing gig for a production company in Dubai. Those clients message. They do not reliably answer email, they will not schedule a call for a two-line question, and their entire team coordinates in a chat. Meanwhile your proposals, invoices and notes live somewhere else entirely, and the two halves of the relationship never meet.
Say the honest thing first
If your clients are all inside the United States, you probably do not need this channel. Domestic clients email, call and text, and forcing a messaging workflow on them adds friction with no gain. The value here is specifically cross-border. It is worth checking your own last twenty projects before setting anything up, because the answer determines whether you need a messaging strategy or just a better follow up habit.
