The Internet is a network of many computers around the world. They all communicate with each other using special rules. Computers are of two types: servers - which distribute information, and clients - which consume information. The servers may also host websites. Each server has its own unique IP address and looks something like this: 188.8.131.52. Agree, remembering such an address is problematic. Therefore, complex digital combinations are replaced with domain names for the convenience of the user. For example, a person enters "google.com", the computer finds the server's IP address as "184.108.40.206" and directs the user there.
Domain name is a unique name for a site. It is bought for a specific period. Domain must be free or put up for auction by the current owner. You can find a free domain on this site: whois.net
The site hosting service is called hosting. Technically, it is a server that hosts several sites from different clients. Customer sites are separated from each other and cannot see other people's data. The more sites on one server, the higher the load on it and the slower the sites work.
Hosting is usually provided on a paid basis, at a price of about 100 rubles. per month or more. The better the hosting, the higher the price. Hosting quality is determined by several factors: ease of use, speed and stability. Almost all hosting providers provide free CMS.
This is a digital signature of the site, which is required for the secure data transfer protocol to work on the network. Simply put, it provides an encrypted connection between the user and the site. That is, the information they exchange is protected from outsiders - the provider, operator, administrator of the Wi-Fi network, and others.
How to understand if a site is secure or not?
Very simple. Take a look at the address bar (URL) of this page. To the left of it (or on it - it depends on your browser) you can see a green inscription, or a small lock symbol - all protected sites are marked like this. Also, the http protocol at the beginning of the address is changed to https (the additional "s" means secure, "protected").
Why should I protect myself and be encrypted if I am not doing anything illegal?
Each user, entering any site, leaves a lot of information about himself. If such a site does not have an SSL certificate, then the data entered by the user can be stolen. Therefore, first of all, online stores, banks, payment systems, social networks, forums need to be protected - everyone who processes personal data and conducts financial transactions.
Browsers, search engines, and especially Google, have their own way of fighting unprotected sites: for example, such pages are demoted in search results. And even before clicking on a link to such a site, a warning screen may be displayed.