Downtime is the amount of time that your website is unavailable and cannot be accessed by visitors. You can track it yourself with all sorts of tools, such as Pingdom or GTMetrix
Why does it matter?
Search engines are compelled to serve the best results possible to a visitor’s queries. While this has a lot to do with the content on the page, they also take reliability into consideration. If a website is prone to downtime, search engines are less inclined to serve it as a result.
What should I do about it?
This is one for the techies – or the hosting company. Downtime is usually a symptom that you need a better server, or that the server has a configuration issue.