The most well known benefits of strength training are the physical benefits. This type of exercise encourages hypertrophy. Which essentially means this helps build and/ or tone muscle depending on the amount of repetitions and frequency. If you go for high reps you will improve not only your muscular endurance, but it can also help your cardiovascular fitness too.

People are often shocked when they go from a sedentary lifestyle to an active one with strength training  on how much better they feel mentally. To start off being more active makes you more tired so that really helps you sleep longer and sleep better, especially with strength training. This leads to having more energy throughout the day.  Strength training can also help clear your mind because when you get into it and really challenge yourself you are only focusing on the task at hand. 

Another underrated benefit of strength training is the social aspect. Although a gym is not needed, becoming a member of a gym is a great way to connect with other people. And since having a spotter is essential for some lifts this is a great way to have some fun with a couple of friends.  Also with the progress you will make in the gym you will become more confident. "Look good, feel good", right? This can help some come out of their comfort zone and socialize more.