What it is
A workflow starts with a trigger (a new lead, a form, a payment) and runs actions in order: send a message, wait, update the CRM, notify someone.
Why it matters to an agency
It is the backbone of automation in GoHighLevel, n8n or Make. Built well, it does the repetitive work without human intervention.
Example
New lead, wait 5 minutes, send a welcome SMS, if they do not reply in 1 day send an email, and mark the stage in the pipeline.