Trademark infringement occurs when someone uses a trademark that is identical or confusingly similar to a registered trademark without permission. This can happen in various ways, such as selling counterfeit products or using a brand name that resembles another brand, leading consumers to believe there is a connection. The purpose of trademarks is to protect brand identity and prevent consumer confusion. When trademark infringement is identified, the owner of the trademark can take legal action to stop the unauthorized use. Remedies may include monetary damages, injunctions to prevent further use, or even the destruction of infringing goods. Protecting trademarks helps maintain the integrity of brands like Nike or Coca-Cola.