If you need to enter a special character or symbol into your text that's not available on your keyboard, then you can take advantage of the special symbols and characters that are built-in to the HTML standards, that browsers will understand.
Each special character has a special code starting with an ampersand & and ending with a semi-colon ; to identify the code.
You can enter these characters in any text box that accepts HTML including your product descriptions, content pages, and blog posts. For example you can write © to get a copyright symbol © or £ to get a Pounds Sterling currency sign £.
A full list of the symbols you can use can be found on the W3 website (who maintain the HTML standards) at https://dev.w3.org/html5/html-author/charref