Your business website is like a car. Without regular service and maintenance, it will eventually fail. Now that most people do business online, there is a lot of competition. All your competitors are having a hard time making sure your website is high on search engines. So how can you stay ahead of the competition if you don't maximize your ROI and make the most of your site?
You need to do regular website maintenance. Most website maintenance is self-service, but it's best to hire a website maintenance service to help you. In this way, you can focus on growing your business and worry less about maintaining your website.
If you use some kind of content management system like WordPress or some kind of script like PHP, it should always be up to date. WordPress usually updates automatically, but you may need to update it manually.
Also, if you are using a web server, the web service maintenance provider should update its core server software on a regular basis. For example, check if the FTP service running on the server is up to date. However, if you are running your own web server, manually test and apply the updates.