Proofreading is scrupulous verification of the text before sending it to the customer. Everything is checked: the euphony of the text, its readability, the disclosure of the topic, the external and internal structures, and, naturally, the existence of various kinds of errors. Unfortunately, many under the text are only meant for checking for spelling and punctuation errors. And some do not consider it necessary to perform this part of the work (proofreading is a painstaking task and takes a lot of time). Good copywriters always do proofreading the text before sending it to the customer. Because they understand that even if they have exceptional literacy, they can make a number of mistakes, starting with unnecessary gaps and ending with annoying typos.
For someone, proofreading the text is not particularly difficult – just run through the text with your eyes to reveal the existing shortcomings: somewhere the sentence is too long, somewhere a couple of typos are allowed, and somewhere an extra space hides. But for copywriters-beginners, the process of proofreading a text is often a great challenge: they are just starting to learn the basics of copywriting, and if you isolate spelling and punctuation mistakes, they easily manage extra space, with readability and text structure there are difficulties.
The proofreading of the text is a laborious process. The “cycle” described above can be repeated repeatedly until the necessary balance is reached between readability and uniqueness of the text.
If you are a beginner in editing, do not frighten you with the process of reading the text: you will process 3-4 texts in this way, and on the fifth one you will see the shortcomings yourself and quickly correct them.