Editing is the process of making changes and suggestions to a piece of writing, aimed to improve the overall content quality. Editing ensures that your writing is as impactful as possible, remains consistent and uses the correct tone. It also ensures the best choice of words are used to convey your meaning, in as few words as possible to keep your writing succinct. There’s also an extra opportunity to check your writing for any spelling or grammatical errors.
If editing and proofreading your own work, I recommend putting your content aside for at least a day or two so you can look at your writing with fresh eyes and a new perspective. Often printing the work out can also help you spot mistakes and easily make changes. (There’s also the reading upside down trick, which apparently works too!).
However, re-reading over your own work can be tedious and might result in you unintentionally skimming the text. Even spell and grammar check applications like Microsoft Word, Grammarly and SpellCheckPlus all have their flaws.