The benefits of using Google to provide these libraries instead of your own server include:
- Google’s huge CDN (content delivery network) can deliver the file much faster than your own server(s). Since Google has large data centers all over the world, these files will be served from data centers geographically closer to your users. This helps to reduce network latency and works to increase reliability, scalability, and website speed.
- The more sites that include Google’s google.load() API the greater the chance that a user has already has the file cached, thus enabling your site to load faster as the script will not need to be downloaded.
- You save bandwidth as you no longer have to serve the file(s).
- The versioning system that Google has created makes it easy to include specific versions of these libraries.
View the complete list of ajax libraries hosted by Google.