Domain names end with extensions called TLDs. The TLD is the letters that appear after the last dot in the domain name. For example, .com is a TLD. Fortunately, there are a wide variety of TLDs available, and there are even geographically specific TLDs that specify the location of a web site. The cost of a domain name will usually depend upon the TLD.
Dot .com, .com.ss domains are the most common, with .org, .net, and .info following closely behind in terms of popularity. We have domains for South Sudan (.SS) with extensions like .com.ss, .net.ss, .org.ss, .biz.ss, .me.ss, .edu.ss, .sch.ss.