Using the same campaign template in several accounts can be very useful. You can easily copy a campaign from one account and save it in another.
Steps to copy a campaign to another account:
STEP 1 — Open campaigns section,
STEP 2 — Click on magnifying glass icon to see the preview,
STEP 3 — Click on the archive link icon and copy the URL of the campaign,
STEP 4 — Switch to another account,
STEP 5 — Open templates section or the Design step when creating a campaign,
STEP 6 — Import the campaign using Import from URL option,
STEP 7 — Paste the URL,
STEP 8 — Click on Import URL,
STEP 9 — Save changes.
You can also check Sharing Templates Between Accounts