Common grounds for a trademark objection include similarity to existing marks, where the proposed mark is too similar to a registered one, potentially causing confusion among consumers. Lack of distinctiveness is another reason, where the mark is not unique enough to identify the source of goods or services. Misclassification of goods or services can also lead to an objection if the description doesn’t match the appropriate classification. Descriptiveness or genericness is another common objection, where the mark is considered too descriptive of the goods or services or is made up of generic terms. Lastly, the likelihood of confusion with prior marks can result in an objection if the proposed mark shares visual, phonetic, or conceptual similarities with an existing mark. These objections are designed to ensure that trademarks are distinctive, non-deceptive, and effectively identify the source of products or services.