“Tailor your resume to the job” is the most common piece of job-search advice out there, and also the most vaguely explained. Most people hear it and either ignore it (send the same resume everywhere) or overcorrect (rebuild the whole document for every posting, burn two hours, and quit after five applications). Neither works. The real process is faster than a rebuild and more deliberate than a single generic resume — you're changing a specific, small set of things, not everything.
Your work history doesn't change. Your dates, titles, and the companies you worked for are facts — they stay put. What changes from application to application is emphasis: which of your real accomplishments you lead with, which skills you surface in the summary, and which keywords from the posting appear in your bullet points in the applicant tracking system's own language.
Your job titles, employment dates, education, and the underlying facts of what you did should stay exactly as they are — changing those isn't tailoring, it's fabrication, and it's the kind of thing that gets caught in a reference check or a follow-up interview question you can't answer. Tailoring is a framing exercise on top of a fixed, honest set of facts, not a rewrite of the facts themselves.
That's the entire loop, and it's fast once you've done it a few times — the slow part isn't the editing, it's figuring out what to emphasize for a role you haven't thought carefully about yet. This is exactly the step Erascend automates: paste in a job posting and it scores the fit against your real background and generates a tailored resume built from your actual experience, not a template.
Keyword-stuffing a resume with terms from the posting that you can't actually speak to in an interview is a fast way to get an offer rescinded or, more commonly, to bomb the interview when someone asks a follow-up question about a “skill” that was really just a word swap. Tailoring is about emphasis and framing of things you genuinely did — not about claiming things you didn't.