Glossary
Website monitoring glossary
Plain definitions of the terms that come up when you look after client sites, domains and certificates.
- Security3 min readWhat is a certificate authority (CA)?A certificate authority is an organisation browsers trust to issue SSL certificates. Learn how trust works and what free and paid authorities differ in.Read
- Search3 min readWhat is click-through rate in Search Console?CTR is clicks divided by impressions. Learn how Search Console reports it, why it depends on position and how to improve it for a page.Read
- Performance3 min readWhat are Core Web Vitals?Core Web Vitals are Google's measures of loading, interactivity and visual stability: LCP, INP and CLS. See the thresholds and how to track them.Read
- Domains3 min readWhat is DNS TTL?DNS TTL is how many seconds resolvers may cache a record before asking again. Learn how it affects site moves and why DNS changes seem slow.Read
- Domains3 min readWhat is a domain redemption period?The redemption period is the stage after a domain expires when it can still be restored for a higher fee. Learn how long it lasts and what comes after.Read
- Uptime3 min readWhat is heartbeat monitoring?Heartbeat monitoring alerts you when a scheduled job stops checking in. Learn how it differs from uptime checks and where it is useful.Read
- Domains3 min readWhat is RDAP?RDAP is the modern, structured replacement for WHOIS. Learn how it works, what a domain record contains and why some registries show no expiry date.Read
- Contracts3 min readWhat is an SLA?An SLA is a written promise about the level of service you will provide, often an uptime percentage, how it is measured and what happens if it is missed.Read
- Security3 min readWhat is an SSL certificate?An SSL certificate proves a website's identity and enables an encrypted HTTPS connection. Learn what it contains, why it expires and how to check it.Read
- Uptime3 min readWhat is a status page?A status page shows the current health of a service and its incident history. Learn what it contains, who needs one and when an internal view is enough.Read
- Uptime3 min readWhat is uptime?Uptime is the share of time a website or service is available, usually shown as a percentage such as 99.9%. Learn how it is measured and what it allows.Read
- Security3 min readWhat is a wildcard SSL certificate?A wildcard certificate covers every subdomain at one level, such as *.example.com. See what it covers, what it does not and how it is validated.Read
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