clarification of importing sites


on the individual projects i have :-

options>
tick box (yes) use urls from global site lists if enabled – identified & verified
(so it imports from global identified lists & shares the verified lists

on global options
“build site lists that can be used globally by each project”
identified & verified ticked

i then right clicked on project > show urls> show stats about remaining urls
& project said 0 urls left

i then imported sites from a .txt list
right click on project>import target urls>from file

let gsa ser go through all the urls
i then right clicked on project > show urls> show stats about remaining urls
& project said 0 urls left

then right click on project>import target urls>from identified list
& it says 57630

so could you please explain what gsa does in “global site lists” on the global options & the individual projects.

ultimately i want to import urls (whichever way is best / fastest), let gsa go through them & then gsa will share the verified urls
between each project without doing any other importing.