Summarize the following:
Top-level Domains (or TLDs) are the final part of your domain name, the letters following the dot. There are two TLDs that are commonly used regardless of the nature of the site and that is .com or .net. These are useful as people will assume it is one or the other if they can't remember or do not know your website address. There are a few domains that are used for businesses, beyond the normal two, and you may want to consider them. Using one of the unusual TLDs can help keep costs down, as these usually cost less money to register. Examples include .biz, .info, as well as the industry specific and qualification-requiring options. While the .org TLD is now open to anyone, it is usually used to indicate an organization or non-profit entity. If you are such an entity, it would be a good idea to get one of these domains, as it will lend legitimacy to your organization. While the two most common TLDs are usually used in personal sites, you do have a wide variety of options available to you, if you would rather set yourself apart or save some money. Widely consider your options before settling. There are also TLDs for many of the different countries and regions. If you have a business that only operates within your country, it may be a good idea to choose one of these. They also serve to set your site apart and lower the cost, as the name will be in less demand. Make sure when you choose a name and TLD that you read out loud how the whole thing sounds together. Look for ways in which the spelling or pronunciation might change if the dot was removed. People will accidentally create awkward or offensive phrases, especially if choosing one of the non-standard TLDs. You can also use this to your advantage and make your web address a phrase, like "noneofyour.biz" or "weare.us". Some TLDs require certain credentials to get. These include TLDs like .aero, .int, .museum, or .pro. If you have the credentials necessary to get one of these domains, you may want to consider it. Otherwise, don't worry about these, as you will be unable to get them.

Summary:
Choose a common TLD. Indicate a business. Indicate an organization. Indicate a personal site. Indicate your region. Consider the final phrase. Keep limits in mind.