Just wanted to add to this…

There are 2 types of WordPress updates, major and minor. A minor release (like 4.7.4 to 4.7.5) generally consists of patches and security updates, etc. These very rarely cause any issues when upgrading, and can even be set to automatically upgrade as you are not likely going to have any issues.
A major release (like 4.7 to 4.8) generally consist of big bug fixes, feature add-ons, layout changes, etc. Sometimes, these can be tricky to upgrade, and should be handled manually. For a major release, you should backup the WordPress website before the upgrade, run the upgrade on a staging version of your website, then analyze it from there.

Hope that helps ??