Remembering website link where you copied text from on each rem?

Does remnote remember website links of sites where you copy-pasted text from while creating a rem?

I use remnote essentially as a collection of all useful information learned from the internet during my studying. do I have to manually enter references of each copy-pasted information or does remnote remember that for me, which I can access somewhere?

No, the closest thing is RemNote Clipper that automatically creates and zooms into a rem for the website you opened it from. See