use of bootstrap cdn - SERP Analysis

https://getbootstrap.com/docs/4.3/getting-started/introduction/

https://www.w3schools.com/bootstrap/bootstrap_get_started.asp

https://getbootstrap.com/docs/5.2/getting-started/introduction/

https://stackoverflow.com/questions/17377277/how-to-use-bootstrap-cdn

https://www.bootstrapcdn.com/

https://www.reddit.com/r/learnprogramming/comments/gqjidj/with_bootstrap_when_should_we_use_the_cdn_links/

https://www.geeksforgeeks.org/bootstrap-cdn/

https://www.reddit.com/r/rails/comments/11fyq8w/any_compelling_reason_not_to_use_cdns_to/

https://getbootstrap.com/docs/3.3/getting-started/

https://www.quora.com/What-is-Bootstrap-CDN-used-for