Assuming you want tips for introducing someone to your area of expertise:
-Start by finding out what they already know: ask questions and gauge their level of understanding.
-Explain things in simple terms and use common examples to illustrate your points.
-Don't assume they know anything - bring them up to speed on the basics before moving on to more complex topics.
-Use various forms of media to supplement your explanation (pictures, diagrams, charts, infographics, etc.).
-Be patient and be prepared to answer lots of questions.
-Finally, don't forget to follow up after your initial explanation - make sure they understood everything and offer additional resources for further learning.