How recommended jobs via upload resume in career site is shortlisted?

In 23B, the recommend jobs based on resume is enabled.

We already checked the documentation from Oracle that the weighted job results look at the job title, location and skills but is there any specific document that explains this? and why it is not working when we indicate in our sample resume the exact location, job title and skills we included in our job requisition when we tested this feature.

Additionally, when candidates upload a resume, where will the resume be stored? And if they do not want to continue their application, is it necessary for them to remove it or not?