CloudFlare saw a spike in unusual traffic just before their services went down.  They are still working to recover.

In case you're unaware, CloudFlare offers services that facilitate the routing of network traffic to customers' servers.  There are a variety of services they offer at costs that are from free to fractions of what other companies offer.  Therefore, they are the "hub" for a huge number of individuals and companies in need of such network services.

This failure triggered a cascade of connection issues that halted productivity
worldwide. Heavy hitters such as X, Spotify, and ChatGPT were among the
first casualties, leaving users unable to connect. The ripple effect was immediate
and severe, disrupting communication channels and entertainment platforms alike.

The outage is ongoing, and technical teams are working furiously to plug the
holes in the network. The company is prioritizing the restoration of service
stability above all else. 'We are all hands on deck to make sure all traffic is
served without errors,' the spokesperson said.

Only once stability is assured will the focus shift to a forensic analysis. 'After
that, we will turn our attention to investigating the cause of the unusual spike
in traffic,' they concluded.

As of 12:21 pm GMT, there was a glimmer of hope, though the fix was not
yet absolute. The company said: 'We are seeing services recover, but
customers may continue to observe higher-than-normal error rates as we
continue remediation efforts.'

A further message said: 'Update: we are continuing to investigate this issue.'
For now, the internet remains fragile, with users advised to expect lingering
instability as the situation evolves.

https://www.ibtimes.co.uk/cloudflare-issues-outage-statement-this-cyber-attack-unusual-traffic-crashes-services-1756111