The terms prospect, lead and buying signal are all well-known to B2B sales professionals, but their differences can be unclear. In part, the reason is that different CRM and marketing automation providers are using the terms in different ways. That's why we feel a clarification between prospect, lead and buying signal, and their roles in sales process, seems appropriate.
Our definition is very close to the framework used by HubSpot among others, and helps unify the conversation within a sales team, and further enhance sales and marketing alignment, or smarketing. Be sure to clarify sales terminology in your sales playbook!