Answer: First of all, search engines do not place special emphasis on sites that use capital letters in their domain names. Many sites employ pascal casing or camel casing, the capitalizing of the first letter of each word in a domain name (i.e. youtube.com to YouTube.com) to add emphasis to the viewer.
One, a domain name is traditionally written in lower-case even though it is case-insensitive. If you are writing the name of a company, or a product, or some other proper noun, that proper noun will have its own rules of capitalization. So you’d write Sony but not Sony.com.
It is simply a necessary expense for your business. In an accounting position, a domain name would fall under an intangible asset. Copyrights and patents are intangible, while tangible assets would be buildings or land (also known as property, plant, and equipment).
The characters allowed in a domain name include letters (abc), numbers (123), and dashes/hyphens (—). No spaces are allowed and the domain name can’t begin or end with dash/hyphen.
The domain name in an email address is case insensitive, meaning the case doesn’t matter. The username, however, is case sensitive. However, the email address recipient@EXAMPLE.com is the same as firstname.lastname@example.org. Google email addresses ignore the letter case and periods.
Host names (or ‘labels’), such as example.com are case-insensitive. DNS record types, such as ‘A’, and ‘MX’ are case sensitive. Values in TXT and SPF records are case sensitive. All other DNS record types have case-insensitive values.