Strong Trademarks According to the USPTO

“It’s important to have a strong trademark that is inherently distinctive. This means your trademark quickly and clearly identifies you as the source of your goods or services. The stronger your trademark is, the more easily you can prevent others from using it without your permission…”

“Strong trademarks are suggestive, fanciful, or arbitrary. Weak trademarks are descriptive or generic…”

https://www.uspto.gov/trademarks/basics/strong-trademarks