What is fat? Is taken? who can explain?

Fat is one component of our meal like carbohydrate and protein. Fats are of 2 types  visible fat ( oil, ghee,  butter, cheese etc) and invisible fat ( invisible to normal eye fir example available in dairy products, nuts, flesh food, fried food etc) Fatty foods need to consume in moderation becacause of its high calories ( 1 gm carb / protein gives 4 kcal but 1 gm of fat gives more than the double calories i.e 9 kcal) so anything in excess is bad. ICMR guidelines recommends 500 ml of fat / person / month. So fat should be used in restricted amounts . (Not more than  30% of total calories) Oil wherever its overheated  or repetedly heated forms trans fat and that is carcinogenic. So need to  restrict. Whatever in excess get converted into fat in the body. If you overeat or  high fat consumption and no exercise , the person will gain weight ( undesirable) Highly processed oil  eg vanaspati should not be used at all. Chemically fat is  divided into pufa ,mufa , SFA . So  you have combination of these fats.  Depending on the health condition qualified dietitian  will suggests you which diet is good for you. Do not follow any kind of diet on your own  or with google). I hope you have got the answer of your questions. In case you need more help, you can contact me through this platform. Thank you.