Yes you need it for your website unless you're a Web Developer, Programmer, Systems Analyst and SEO and SEM expert. When customers invest in a new website, there is a misconception that it "should work flawless forever" unfortunately it won't! Websites require regular maintenance just like your computer does. If your home or office computer starts to get issues, then usually you apply updates to the operating system, restart it, update your anti-virus and software, and if it's still not working correctly you might consider taking it to and IT specialist for help. Similar principles apply to your website. At a code level, it will require a professional to perform certain task to keep your website functioning correctly and healthy in a changing environment.

A website that is not maintained correctly will quickly become outdated on a code/software level. It can also have an effect on your visitors experience with broken links, slow page loading times, and dated content giving the impression of a business not paying attention to it's customer experience. There are also security issues with your website getting hacked with malware and spyware. Those two items alone can take your website down or cause it to have many problems.