A gTLD is a generic top-level domain.
It is the part at the end of a domain name that is not tied to a specific country. Common examples include:
.com.net.org.info
There are also many newer gTLDs, such as .shop, .online, .site and .agency.
Some gTLDs are open to almost anyone. Others have restrictions depending on the registry rules. For example, some extensions are intended for particular industries, organisations or communities.
When choosing a gTLD, think about whether customers will recognise and trust it. A short, clear domain on a familiar extension is often better than a longer or unusual domain that people may struggle to remember.