If you run any PHP-based software like WordPress, Magento, Drupal, or others, you will be excited with the release of PHP 7. The performance aspect of the language has received major emphasis with this release, giving new life to PHP.
You will have to make sure your software is compatible with PHP 7, of course, in order to upgrade your hosting and take advantage of the faster performance. Some web software like phpBB will have to wait for version 3.2 in order to be compatible with PHP 7.
This infographic compares some of the popular web applications out there between running PHP 5.6, HHVM 3.7, and PHP 7. Typically, you are able to process a lot more requests per second or handle more requests with less hardware.