A trademark opposition can be filed for several reasons, primarily to protect existing trademarks and prevent confusion in the market. One common ground is similarity to an existing mark, where the proposed mark is too similar to a registered mark, potentially causing consumer confusion. Likelihood of confusion is another reason, where the new mark may be mistaken for an existing one, leading consumers to believe the goods or services come from the same source. Marks that are descriptive of the goods or services they represent or are deemed generic and fail to distinguish the brand can also be opposed. Additionally, marks that are deceptive or misleading about the quality, nature, or origin of goods or services can face opposition. Lastly, a mark may be opposed if it lacks sufficient distinctiveness, making it difficult to uniquely identify the brand. These grounds are designed to ensure fairness, protect consumer interests, and maintain healthy market competition.