Example 1: If you call a friend or company department for support or advice, they may provide you with help in the form of a talkthrough, audibly guiding you through each step towards the solution.
Example 2:
Emergency services will provide a talkthrough to a caller who may be trying to revive an
unconscious person, audibly guiding them through each step in a life-saving procedure, such as CPR, until paramedics arrive.