A domain name is comprised of two principal parts: the second-level domain (SLD) and the top-level domain (TLD).

Arrows pointing to the SLD and TLD within the GoDaddy web address


The Second-Level Domain (SLD) is the part that appears after “www.” in the above example. The maximum length of an SLD is 63 characters, but generally, you want to pick an SLD that is short, branded and memorable.

The Top-Level Domain (TLD) is the last section, which in this case is the “.com” section. TLDs are also called “domain suffixes” or “domain extensions” and there are now many options besides “.com” that people can use for their domain names.