What actually is that string of characters?
Not all TeamViewer keys are equal. Depending on your license type, the key grants different permissions. teamviewer licence key
So, treat your key with reverence. Back it up. Guard it. And for the love of all that is holy, do not buy one from eBay. What actually is that string of characters
Without a valid TeamViewer licence key, you remain on the free version—fine for helping a friend, but illegal and impractical for any business or frequent use. the key grants different permissions. So
Back then, "activating" meant typing a long string of characters into the software to prove you'd paid. Private users, however, enjoyed a "freemium" pass, using the same powerful tools for free as long as their use stayed non-commercial. The Great Shift (2017–2018)