In school you want to do better than others and get the best grades. There is always a push to do better in school. People that do their homework and take time to study for the tests usually do better than those that do not. Also, if you are struggling, or just want to raise your grade, you can do things like extra credit if it is offered, staying after school for help, going to tutorials for help or make up work, and talking to the teacher to see if there is anything else you can do to raise your grade or anything they can do to help you understand the class better.
In work, you want to be better than your co-workers to earn a pay raise that they might not get, or maybe just to not get fired. Things people might do in their work are making sure they are there on time or early every day, staying later for extra work, or being more efficient with their time while they are at work.
Most importantly, do not give up. Whatever you are doing or trying to get better at is not going to be easy, but if you give up you definitely will not make it, so do not give up and keep pushing.