LCHF stands for Low Carb High Fat, in other words low carbohydrates and more fat.
The fat you eat should be natural fat, as in coconut oil, proper butter, full fat cream, fatty fish, meat, nuts and avocado. (No margarine!)
Many people think LCHF is a weight loosing diet to reach their ideal shape, others see LCHF as a lifestyle, where the food is means to optimize health and well being.
How you look at LCHF is up to you, you decide. But try it before you decide how it works for you!