So this keto thing, I eat bacon, burgers and fatty food and just cut the bread and sugar, right? Ha, in no world can you consume copious amounts of unhealthy fats and think that this will be good for your body. In fact, the fat premise behind keto incorporates healthy fats while restricting carbs/sugars. If done right it can do amazing things for many people, but like anything else you have to be smart about it.
Everything in moderation, this applies to so many facets of life and is the case with the ketogenic way of life. Keto is about getting your body to use energy from good fats (also excess fat reserves) as fuel for the body instead of storing the fat and running (I use this term loosely) on carbs and sugars. So how do you know what kinds of fats to eat and what to avoid. The following link is to an article that I feel speaks to the true nature of ketogenics and keto eating, while helping you to maintain a healthy body as well. There are many options but the items that they have listed are your top go to's and do not's! Again, as always do your homework and research everything about keto and talking to a doctor is also a good idea when making drastic dietary changes, particularly if you have health concerns.
https://www.everydayhealth.com/ketogenic-diet/diet/best-worst-fats-eat-on-keto-diet/