Like other vital areas in your life, like your car and house, websites need regular maintenance; The importance of website maintenance, theme, and plugin updates cannot be emphasized enough. A good running website should be maintained with fresh content and up-to-date software and security patches. Search engines place a high value on new website content and frown upon broken links and pages.
With the current rash of website hacks and breaches, frequent security updates are required to reduce vulnerabilities and risks. Even if you do not store critical or sensitive information, a breach in your website can cause your customers damage by the hacker infecting visitors with viruses or directing them to websites not controlled by you.