In the United States, the United States Intellectual Property Office (USPTO) is the agency responsible for managing the registration of trademarks. Here are some benefits of trademark registration in the United States: 

• Protecting Intellectual Property Rights: Registering a trademark helps protect your intellectual property rights to your brand names and products. It allows you to use and protect your brand name against competitors.
• Create trust with customers: Customers will feel more secure when dealing with a registered brand. This shows that your brand is trustworthy and quality.
• Brand development ability: Trademark registration helps you build your brand and create unique style values, easily recognizable and attract the attention of customers.
• National Protection: When you register a trademark, you get national protection, which means you have the right to use your brand name and products in the United States, avoiding legal disputes and unfair competition.
• Easy international registration: Registering a trademark in the United States also makes it easy to register your trademark in other countries around the world

Registering a trademark in the US can help you register and access the Amazon Brand Registry, an Amazon program that helps brands register, protect, and manage their trademarks on Amazon. When you register your trademark in the US, you can use that brand name to register with the Amazon Brand Registry.

Once accepted into the Amazon Brand Registry, you will have many benefits, including:

• Manage and protect your brand on Amazon: You will have control over and manage your products on Amazon by registering them with the Amazon Brand Registry. This helps protect your product from counterfeit and other non-genuine products.

• Increase your brand's uniqueness and credibility: Once accepted into the Amazon Brand Registry, your brand will be marked as "registered" on Amazon, increasing your brand's uniqueness and credibility in the eyes of your customers.

• Improve customer experience: You can use the Amazon Brand Registry to customize your product page on Amazon and offer more detailed product information, helping to improve the customer experience.

So, registering a trademark in the US is an important step towards registering with the Amazon Brand Registry and protecting your products on Amazon.