Ws.digicert.com is a subdomain of DigiCert, a major certificate authority. But that's where the good news ends. When you visit this URL, you're greeted with a plain '404 Not Found' page — no content, no service, no redirect. It appears to be an unused or misconfigured subdomain.
Legitimate companies typically redirect dead subdomains to a main site or at least show a branded error page. The absence of any branding, contact info, or legal pages is unusual for a subdomain tied to a serious business. For infrastructure subdomains like this, the main concern is whether someone is using the URL for phishing or other malicious purposes. There's no evidence of that here, but there's also no evidence the URL serves any legitimate purpose either.
If you landed here expecting a service, your best bet is to treat the link as broken. Check the main DigiCert site for whatever you were looking for. This URL itself doesn't inspire confidence, but it also doesn't show clear signs of a scam — it's just an empty shell.