Website uptime monitoring: what to watch and how often

Why monitoring matters

Downtime costs more than the minutes it lasts. A visitor who hits an error during an outage rarely waits around and tries again later; they leave, and many do not come back. If the outage lands during a campaign or a busy period, the lost sales and signups stack up fast.

The slower damage is to trust and to search. Repeated outages teach regular visitors that your site is unreliable. Search crawlers that keep hitting errors will slow how often they crawl you, and a long enough outage can push pages out of the index. Monitoring does not prevent any of this on its own, but it shrinks the gap between something breaking and you knowing about it, which is usually the difference between a blip and a disaster.

What to monitor beyond a simple ping

A basic uptime check confirms the server answers. That is the floor, not the ceiling, because a server can be up while the site is broken. Good monitoring checks the things that actually tell you whether visitors can use the site.

• The HTTP status code, so a page returning 500 or 403 counts as down, not up.
• Response time, since a page that takes 15 seconds to load is failing even if it eventually returns 200.
• Content on the page, by checking that an expected word or element is present, which catches blank or error pages that still return 200.
• The SSL certificate expiry, so a lapsing certificate becomes a warning weeks ahead instead of a sudden full-page security error.
• Critical user paths like login or checkout, not just the homepage, because those are where downtime hurts most.

How often to check

Check frequency is a trade-off between how fast you find out and how much noise you generate. A check every minute means you learn about an outage within about a minute, which suits a site where downtime directly costs money. A check every five minutes is fine for a blog or a brochure site where a few minutes' delay changes nothing.

Run checks from more than one location if you can. A single checkpoint cannot tell a real outage apart from a network problem on its own end, so a site that looks down from one place might be perfectly fine for your actual visitors. Checking from a few regions also catches the case where your site is down for users in one part of the world but not another.

Setting an alert cadence that works

The fastest way to make people ignore alerts is to send too many. A single failed check is often a momentary network hiccup rather than a real outage, so wait for two or three consecutive failures before alerting. That small delay filters out most false alarms while still catching real downtime within minutes.

Match the channel to the urgency. A quiet email is fine for a certificate that expires in three weeks. A real outage on a revenue-critical page deserves something that actually interrupts you, like an SMS or a push notification. And send a recovery notice when the site comes back, so you know an incident is over without having to go and check.

From spot checks to always-on monitoring

Running a status check by hand is great for confirming a fix or investigating a report, and Sitewell's free tools cover that on demand. But you cannot sit there refreshing a checker all day, and outages have an unhelpful habit of happening at 3am or while you are on holiday.

That is the gap continuous monitoring fills. Sitewell's paid 'Watch it' monitors run these checks around the clock and alert you when something breaks, so the same checks you would run by hand happen automatically and reach you wherever you are. The free tools answer 'is it working right now'; the monitors answer 'tell me the moment it stops'.