A internal term used in large UK supermarket chain, Tesco. It is the process for communicating information each week about the company and new products. Managers within tesco have team5 throughout the day to analyse sales, discuss one in front patterns and tell each other what they'll do tomorrow. More menial staff will need to read a sheet called "team 5" every week, which updates them on company information and initiatives.
Cashier: I put through a whole pile of Sainsbury's vouchers and I ended up paying out of the till for the customer to take the stuff away!
Team Leader: For god's sake, did you not read your team 5? We don't accept Sainsbury's vouchers anymore!