This error occurs when you try to view a non-existent page or page with URL changed for some reasons. The address typed incorrectly, also could cause 404 error.
WordPress is a free and open-source content management system written in PHP. It is most associated with blogging but supports other types of web content including mailing lists and forums, media galleries, and online stores. Today it is one of the popular software applications for running websites. It powers about 25% of all websites on the internet.
A Content Management System is a software that helps to write, edit, organize, and publish content on a website.
Typically, a CMS will provide:
You can upload files on your hosting account using FTP or cPanel File Manager.
HTTPS is the protocol used when communicating with a website over SSL. The last letter S - from the word "secure" - means "security." This is a protocol that protects the transmitted data by encrypting it.
A web server is a software application that communicates between your computer or server and the internet. Web servers are an important piece of a website hosting. The web server runs continuously on the computer (server)where your website is hosted. It receives requests coming from the internet and then responds to those requests by delivering web pages, images, and other resources to the requester.
Name servers are a fundamental part of the Domain Name System (DNS). They allow websites to use domain names instead of IP addresses, which would be much harder to remember. In order to find out what a certain domain name's name servers are, you can use a WHOIS lookup tool.
Web hosting is a service that allows organizations and individuals to post a website or web page onto the Internet.