HTTP stands for Hyper Text Transfer Protocol.
WWW is about communication between web clients and servers.
Communication between client computers and web servers is done by sending HTTP Requests and receiving HTTP Responses.
npm is the world's largest Software Registry.
The registry contains over 800,000 code packages.
Open-source developers use npm to share software.
Many organizations also use npm to manage private development.
If you really want to spend some time digging into the reports and redesigning your site, you can really analyze and customize your site's performance on Google Search. This track assumes that you are familiar with basic SEO practices and terms.
There are a number of websites which exist solely to help you determine how fast your website loads, often from many different geographical locations. That helps you get a sense of your overall “User Experience” which is a major part of SEO in 2018 and beyond.