Top Level Domains: This is what appears after the “.” as in .com, .info , .world etc. In the example of this website, it is the .guide. There are about 1000 of them, so don’t panic about finding a .com. I have seen .com domains that are so long, that it is hard to remember them. Some top level domains are very expensive. Some are over $2,000 USD per domain.
Why so expensive?
Someone had to front hundreds of thousands of dollars for the top level domain with no guarantee of a return.
Yes you interpreted that right. For the price of a mid sized house in a mid sized city you too can have your own top level domain (your own .something) The cost is high, and the annual cost of running the top level domain is high. The investors need to recover their investment some how, so you will pay more. However don’t worry, the cost isn’t that bad compared with the return on your investment that you can earn.