Trademark enforcement as part of your IP.Insure intellectual property insurance policy gets you the ability to go after people who ride on your branding coattails.
This includes sending letters to infringers, Amazon/eBay/Etsy take down actions, DMCA take down notices, and appropriate lawsuits in state and/or federal court.
Many times, small companies have a trademark on their product but larger companies will merely start using it without doing a clearance search. For example, the Cleveland Indians baseball team changed their name to the "Guardians" - only to recognize afterward that the Guardians already existed as a local roller derby team.
IP enforcement insurance gives you the financial horsepower to go after infringers and preserve your investment in your brand.