Final answer:
The Encounter History Tracker (EHT) allows viewing of past client encounters in a business or organizational context, providing a comprehensive record of client history and preferences for better engagement.
Step-by-step explanation:
The feature that lets you view past client encounters on the left-hand side of the screen below the Relations tab is known as the Encounter History Tracker (EHT). This tool is designed to help businesses or organizations keep a record of all past interactions with a client, which can be critical for maintaining a comprehensive understanding of the client's history and preferences. By using the EHT, businesses can ensure that they are informed about previous encounters before engaging in new interactions with a client.