There are a few things you should look for when choosing a CDN:
Reliability and uptime: You want to make sure that your CDN can be counted on to deliver your content quickly and reliably. Make sure to check reviews and user experiences before settling on a provider.
Global coverage: One of the main advantages of using a CDN is the global reach it provides. Make sure that the CDN you choose has servers located in the regions where your target audience is located.
Security features: Many CDNs offer a firewall to protect your site against attacks from bad actors. All your traffic is routed through this firewall and only health traffic is rerouted back to your server.
Pricing: CDNs can vary widely in price depending on bandwidth and additional features like firewalls, so it's important to compare providers and find one that meets your needs and fits within your budget.