Update your TYPO3 installation (support for symbolic links required).
Finalise the upgrade process when moving to a major release of TYPO3.
View and search for important changes that have been made in major and minor releases of TYPO3.
Identify extensions that modify the Table Configuration Array (TCA) in ext_tables.php.
Check compatibility of active extensions with the current TYPO3 installation.
Identify any third-party extensions with an outdated TCA configuration which should be adapted for the installed version of TYPO3.
Scan extensions for deprecated or outdated TYPO3 API calls.