Suet feeding was once primarily for winter feeding, but now has become a year-round activity and supplements a regular seed-feeding program (and in some cases replaces seed altogether). 
Wild Bird Suet is a high-energy source of food for birds, but used to have a bad connotation because it was messy and greasy. The new generation suet produced by C&S uses rendered beef kidney fat and seed, fruit combinations that may be easily fed year round. C and S also has a suet “dough” form that won’t melt for those extremely hot southern areas.
To fill a suet feeder, simply take off the plastic wrap, keeping the suet in the plastic container, and insert into a suet basket.
Hang the basket so that the suet is facing upside down–wild birds like to eat suet from this angle. No mess–no melting–and an excellent source of energy fat and protein to wild birds when they need it most.
Suet has come long way from the corner butcher and is now a highly refined product that is easy-to-use and extremely rewarding.