Why do I need to update the server version to PHP 7?

Take into the consideration the following reasons

1

The official WordPress site recommends PHP 7.

2

An outdated server PHP version may expose your site to security vulnerabilities.

3

PHP 7 Is blazingly Fast. Site speed directly impacts responsiveness, which makes it feel fun to use. What’s more, good usability keeps visitors on your site longer, and can potentially improve your conversion rates. Site speed is also a ranking factor for search engines, and a high-ranking website stands to earn greater traffic.