All websites need to be maintained.  As a WordPress website designer, I’m going to focus here on WordPress website maintenance, but understand that the basic principles apply to websites of all architectures and frameworks.  It’s also good to understand that this is not unique to custom websites.  If you chose to create your own site on something like Wix or Squarespace, they are also doing site maintenance, which is part of why there’s a monthly fee associated with these platforms. …