The phrase "expertise level" refers to how knowledgeable and skilled someone is in a particular subject or field. It indicates their level of expertise or the depth of their understanding and abilities in that specific area. Full definition
This would help you gain expertise level on your readers mind. (bookpromotionhub.com)
It is better to present all your skills in order of expertise level in separate broad sections let's say for face skin and hair. (coverlettersandresume.com)
We have housed writers with varied expertise levels and niches. (professaywriters.com)