How many people have good memory?

The concept of "good memory" can vary widely among individuals and populations, influenced by factors such as genetics, environment, and practice. While there isn't a specific percentage of how many people have good memory, research suggests that cognitive abilities, including memory, can be improved through techniques and training. Generally, many people possess varying degrees of memory capacity, with some Excelling in specific types of memory tasks. Overall, it's a diverse range influenced by multiple factors.