A starets (pronounced STAR-etts) is someone who is a very wise person in the Russian Orthodox Church. They are kind of like spiritual teachers who help people learn about God and how to live a good life. They are usually older people who have lived a long and holy life and have a lot of experience and knowledge to share.
Starets are like really good friends who also give great advice. They listen to people's problems and offer them guidance and wisdom. They help people understand how to be humble, patient, and full of love.
People who follow the starets often visit them and listen to their words of wisdom. The starets gives them advice on how to be a better person and live a life that is pleasing to God.
So, to put it in simple terms, a starets is a wise person who helps others learn about God and live a good life. They are like really great spiritual teachers who give good advice and guidance.