You apply, nothing comes back, and you conclude your profile is not good enough. That is almost never the case. In most companies software ranks applications before a recruiter opens a single one.
These tools do not judge your career, they look for words. If the job says "Product Owner" and your CV says "product project manager", you are describing the same work, but the software makes no connection. You are dropped without being read.
The other reasons are of the same kind: a job title that does not match, dates no machine can interpret, a column layout that scrambles the parsing, a degree level never written plainly.
None of this is fixed by working harder. It is fixed by writing your CV in the words the job posting uses, and that is exactly what the analysis does: it compares the two and shows you, line by line, what is blocking you.