When choosing a domain name extension for your site, there are a few things to consider. The most popular domain name extension is .com, which is short for "commercial" and is generally seen as the default option for businesses. However, .com domain names can be difficult to find if the name you want is already taken, so you may want to consider other options, such as .org (for organizations) or .net (for networks).
Alternatively, you can choose a domain name extension that is specific to your location or industry. For example, if your business is located in the United Kingdom, you could choose a .co.uk domain name extension. Or, if your site is focused on a specific niche, you could choose a domain name extension that relates to that niche, such as .photography or .fitness.
Ultimately, the best domain name extension for your site will depend on your specific needs and preferences. It's a good idea to do some research and consider your options before choosing a domain name extension for your WordPress site.