Joomla 3.7.1 is a Security Release, it includes a very important security patch. - Joomla 3.x websites need to be upgraded as soon as possible.
If you are running a website on Joomla 3.7.0, update it immediately!
Joomla! 3.7.1 brings a patch for a critical security issue as well as it fixes several bugs.
More information about Joomla 3.7.1 release you can find here.
See how to update your Joomla installation.