What do any last letters after the second period mean in a URL?

The last letters after the second period in a URL are known as top-level domains (TLDs). These are the suffixes that follow the second dot in a domain name and indicate the type of website or its geographic location.

Here are some examples of TLDs and their meanings:

.com - Commercial websites

.net - Network-related websites

.org - Non-profit organizations

.edu - Educational institutions

.gov - Governmental websites

.mil - Military websites

.info - Informational websites

.co.uk - Commercial websites in the United Kingdom

.ca - Commercial websites in Canada

.de - Commercial websites in Germany

.jp - Commercial websites in Japan

.cn - Commercial websites in China

These are just a few examples of the many TLDs that exist. There are also country-specific TLDs, which are used for websites in a particular country. For example, the TLD .us is used for websites in the United States.

TLDs are important because they help to identify the type of website and its geographic location. This can be useful for users when they are trying to find specific information or when they want to ensure that they are visiting a legitimate website.