A trademark is a word, phrase, design, or combination of those things that identifies and distinguishes the source of a product from others. People often think of trademarks as representing brands.
Here's an imaginary example of a trademarked company logo
Obligatory Yet Very Important Legal Disclaimer
Don’t be fooled by any complicated jargon. We are not your lawyer and this is not legal advice. We recommend contacting an attorney if you need an actual legal consultation. Rather, this is general information aimed at giving you the legal lay of the land. While we can’t defend you in court, we know that art and IP ownership can be murky territory; the least we can do is arm you with the right kind of knowledge to get you started.