The most important thing about your lawn is the lawn diseases. Diseases vary by climate but there are some common ones too. The most beautiful, most healthy lawn could become an eyesore instantly if it has a disease go untreated. Weeds are another problem you need to take care of, they can take all the beauty of the lawn.
Something that will beautify your lawn and give it a neat and professional look is lawn edging. Edging your lawn can be tedious, time-consuming, and difficult. If you do not know how to do it properly, do not attempt it!
If your lawn ever does become extremely unsightly and unhealthy, the only thing you can do it to make it beautiful again might just be to renovate it.