Uptime is all about how often your website is available and accessible to visitors. Think of it like the reliability of a shop being open when it says it will be. In web hosting, you should aim for as close to 100% uptime as possible. Most quality hosts offer an uptime of at least 99.9%, which is great for ensuring your site is reliably up and running.
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Getting to Know Your Website Hosting Features: Bandwidth, Storage, Uptime Explained