Fats are mostly made up of 2 components, glycerol which is a form of alcohol and fatty acids which are long carbon-hydrogen chains. When 3 of these fatty acids combined and connected to glycerol, it forms what is called a triglyceride, which is found commonly in butter and oils.
Fats have several essential roles in the body; some of these include, insulating and protecting vital organs, assist proteins in their functions by acting as messengers. Fats are also a catalyst to reactions which help control growth and immune function.
It's not hard to find many processed foods containing fats; however if you want fats which will be beneficial to your health you should stick to these sources: