introduce

(of people) To cause (someone) to be acquainted (with someone else).

“Let me introduce you to my friends.”

To make (something or someone) known by formal announcement or recommendation.

“Let me introduce our guest speaker.”

To add (something) to a system, a mixture, or a container.

“Various pollutants were introduced into the atmosphere.”

To bring (something) into practice.

“Wheeled transport was introduced long ago.”