This is the 6326th most frequent Russian word.
учитесь
"Учитесь" means "Learn" or "Study" (imperative, formal/plural).
In this sentence, 'учитесь' is used as an imperative to encourage the action of learning to help others.
Учитесь помогать другим.
Learn to help others.
Here, 'учитесь' refers to the act of formal or informal studying in a general sense.
Когда вы учитесь, вы становитесь лучше.
When you study, you become better.
In this example, 'учитесь' suggests the process of gaining knowledge or skills from excellent examples or mentors.