As you probably know, employers who are hiring new staff receive a lot of job applications. To have the best chance of being selected for an interview, it helps to understand what employers are looking for.
One of the first things they may do is scan through each CV they receive looking for a reason to reject it. Then they might take the time to read ones that interest them in a little more detail. Capturing their attention at this stage can be a crucial step in avoiding the rejection pile.