A trademark is a registered brand that can be placed on or alongside your product or services. A domain name is your Internet address.
So the domain name for Nike is www.nike.com while their trademark (or logo) is:
What's the difference between domain names and trademarks?
Trademarks owners have priority when buying domain names
A domain name is a human readable Internet address, for example, blurtit.com . It is the name that users/customers type into their Internet browser to access your website. It is very important to make sure that your domain name corresponds to your trademark, which you can register via these guys https://bonamark.com/ .