Cloudflare explained
Cloudflare: what it is, how it works, how to protect your site with it – regardless of whether your site is made using WordPress, or some other tool.
Speed and CDN
Content Delivery Network – service for faster delivery of content to visitors
AMP explained (Accelerated Mobile Pages)
AMP explained – what is AMP (Accelerated Mobile Pages), what’s it used for, pros and cons, how to implement it and how to judge whether you should.