1. Ideally, it should reflect the brand or the service/product it provides.
2. Easy to say and remember.
3. It is between 1 and 63 characters long, try not to use special characters like hyphens “-”, which are difficult to say verbally
4. You can do all possible combinations and if you are located in a specific country you can use the country's domain or add it before the extension. Example if you were in Costa Rica, you could use midominiocr.com
5. Select the extension (TLD) that best suits your business and goes according to your idea. Now if it is from a specific country you can also use one from the country. As an example .CR for Costa Rica or .PA for Panama.
6. Remember that you need a Web Hosting to have your website and emails.