SSL (Secure Sockets Layer) is the standard security technology for establishing an encrypted link between a web server and a browser. This link ensures that all data passed between the web server and browsers remain private and integral. SSL is an industry standard and is used by millions of websites in the protection of their online transactions with their customers.
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.
The performance of web sites and applications can be significantly improved by reusing previously fetched resources. Web caches reduce latency and network traffic and thus lessen the time needed to display a representation of a resource. By making use of HTTP caching, Web sites become more responsive.
An HTTP cookie (also called web cookie, Internet cookie, browser cookie, or simply cookie) is a small piece of data sent from a website and stored on the user's computer by the user's web browser while the user is browsing.
Structured data is a common way of providing information about a page and its content - we recommend using the schema.org vocabulary for doing so.
Robots meta directives (sometimes called “meta tags”) are pieces of code that provide crawlers instructions for how to crawl or index web page content. Whereas robots.txt file directives give bots suggestions for how to crawl a website's pages, robots meta directives provide more firm instructions on how to crawl and index a page's content.
HTML is the underlying code used to create web pages. Search engines can pick up ranking signals from specific HTML elements. Below are some of the most important HTML elements to achieve SEO success.
Robots.txt is a text file webmasters create to instruct web robots (typically search engine robots) how to crawl pages on their website. The robots.txt file is part of the the robots exclusion protocol (REP), a group of web standards that regulate how robots crawl the web, access and index content, and serve that content up to users. The REP also includes directives like meta robots, as well as page-, subdirectory-, or site-wide instructions for how search engines should treat links (such as “follow” or “nofollow”).
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.