Recruiters do not have time to sift through thousands of resumes, so many are choosing to use applicant tracking systems to automatically filter through resumes.
By tailoring your resume to a specific job advert, you can subtly reference terminology used within that advert on your resume. This will improve your chances of moving through the pre-set automated parameters.
When a human recruiter reviews your resume, they want to be impressed. This is your chance to make a good first impression, so you need to tailor your resume to each application to show that you are the exact candidate they are looking for.