The label can come back in a later request.
The label is remembered for later
This toy model treats the cookie as a small label that can appear in a later request.
label kept for later
It is not login in this book
The book does not claim authentication or session security. It only tracks exact header text.
header text only
The next chapter sends it back
The later request row will show the matching Cookie header.
later request next
Summary
Set-Cookie gives a small label that a later request can return.
label ready