Temporal Key Integrity Protocol (TKIP) is an older encryption protocol used with WPA, and CCMP is the newer encryption protocol used with WPA2. IEEE has deprecated WPA and TKIP due to various security issues, but many wireless networks are still using these older protocols. IEEE recommends using WPA2 with CCMP because it provides significantly more security.
Later implementations of WPA support Advanced Encryption Standard (AES) instead of TKIP. AES in short is a very strong and efficient encryption algorithm, many applications beyond WPA/WPA2 use AES provided security encryption and ensure confidentiality.
In WiFi Scanner the security column shows the authentication and encryption type configured per SSID.
You can also see who is using WPA2 but with TKIP supported.
If you have legacy devices on the network, then it is possible they only support TKIP and nothing else so having TKIP enabled on your AP will allow those legacy devices to work on the network.