S&P meaning in General ?

Salt and pepper is the common name for edible salt and ground black pepper, which are traditionally paired on Western dining tables as to allow for the additional seasoning of food after its preparation. During food preparation or cooking, they may also be added in combination.

Salt and pepper are typically maintained in separate shakers on the table, but they may be mixed in the kitchen. They are typically found in a set (pair), often a matched set, of salt and pepper shakers. They may be considered condiments or seasonings; salt is a mineral and black pepper is a spice.