Cell phone makers, such as Apple and Samsung, make information about new product releases available and advertise to the public well in advance of product availability. Sometimes these efforts require that consumers sign up to $$show interest$$ or $$reserve$$ a new product so the customer can be notified when it is available. Promotion is a big part of these tactics, but from a supply chain perspective, these tactics also:

Cell phone makers, such as Apple and Samsung, make information about new product releases available and advertise to the public well in advance of product availability. Sometimes these efforts require that consumers sign up to $$show interest$$ or $$reserve$$ a new product so the customer can be notified when it is available. Promotion is a big part of these tactics, but from a supply chain perspective, these tactics also:

help anticipate actual demand for new and innovative products to reduce stock$-$outs and promote good customer relations when products are released.

help firms to avoid rationing new products when they are available.

revent excessive costs from overproduction of new products or products with the wrong features.

All of the answers are correct.