does anyone here actually know what do seeders even do?

i did a quick google search for linkedin seeder profiles and almost all the ones that have job description in their linkedin profile, listed some things like

- agile testing
- setup ci/cd pipeline
- helped team create presentation slides ( no idea wtf is this )

like wtf... and these profiles are from 1 year+ seeders... no full-stack dev tasks at all? or back-end stuffs?