What is a general purpose lubricating grease

What is a general purpose lubricating grease, and what types of applications could it be used in?

General purpose lubricating greases are sold in many retail outlets, such as auto parts stores, hardware stores, etc.  They are typically packaged in a 14 oz. (400 g) tube for use in a grease gun or in a small re-closable container (can or tub).  General purpose greases are used in household and automotive applications, such as automatic garage door opener mechanisms, farm and garden equipment, and user serviceable lubrication points on automobiles.  For automotive applications, always look for the NLGI GC-LB service mark on the product label to be assured that the product is appropriate.