If we had all the time in the world we’d write a CV for each vacancy we apply for. In practice we have many demands on our time. Editing a CV to a deadline increases the chances of errors creeping in too. Proofreading is a skill and it requires the proofer to have distance from the CV so it’s probably wiser to restrict your editing to a one or two sections of your CV.
Tailor your achievements at your current or last job is a good place to highlight why you are so suited to a specific job.
Step through the job advert and look for the skills and abilities the hiring company is seeking. Edit those terms, where applicable, into your employment history.