A trademark can provide some level of protection against competitors using your trademarked brand name or a similar name in Google Ads. However, the specific extent of protection and the ability to stop competition on Google Ads will depend on various factors, including the jurisdiction in which your trademark is registered and the specific circumstances of the case.
Trademarks generally grant the owner the exclusive right to use the registered mark in connection with the goods or services specified in the registration. This exclusivity extends to the online space, including Google Ads. If a competitor uses your trademark in a way that causes confusion among consumers, leading them to believe that the competitor's products or services are associated with your brand, it may constitute trademark infringement.
If you identify an infringing ad, you can take action by reporting it to Google. Google has policies in place to address trademark infringement and may take measures to restrict or remove ads that violate these policies.
In cases where the infringement persists or causes significant harm to your brand, you may consider taking legal action against the infringing party. Consult with a trademark attorney to assess the situation and determine the appropriate course of action.