"Careful editing" means the act of reviewing and making changes to something (such as a piece of writing or a film) with great attention to detail and precision. Full definition
Common sense and publishing experts all stress the need for careful editing before submitting for publication. (writersonthemove.com)
There may be a one word line at the end of a paragraph that you could remove with a little careful editing. (datingsitesreviews.com)
We select a few exceptional manuscripts for publication each year and champion those books and authors through careful edit, design and production. (publishersarchive.com)