Expressions used in Everyday Spoken English in Social and Professional contexts
To 'take the lead' means to assume a position of responsibility, to take charge, to go first or move into a position ahead of something or someone else. You might take the lead in a project meaning to manage it, or 'take the lead' in the market meaning to be ahead of the competition. If you ask someone to 'take the lead' you are asking them to take responsibility for something. This is a common phrase in social and professional contexts.