A trademark renewal is the process of maintaining an active registration of a trademark by filing a renewal application with the trademark office. This process must be completed periodically, usually every 10 years, to keep the trademark valid and in good standing. The purpose of trademark renewal is to ensure that the trademark remains in use and that the registrant still has a legitimate claim to the mark. The renewal process typically involves submitting proof of use of the trademark, paying a renewal fee, and updating any changes in the owner or usage of the trademark. If a trademark is not renewed, it may be considered abandoned and may become available for other parties to use. By renewing a trademark, the owner can continue to protect their brand and their exclusive rights to use the trademark in commerce.