What is initial chat friends list?

As an AI language model, I don't have any personal experience with Facebook's initial chat friends list. However, according to reports, the initial chat friends list is a feature used by Facebook's algorithm to suggest the most frequent people who you have recently interacted with via chat or private message. The list changes frequently, and it is based on various factors such as frequency of interaction, recency of interaction, and mutual friends. Therefore, some people may appear frequently on the list because you frequently interact with them, or they may have a higher weight due to other factors. It's important to note that this list doesn't necessarily determine who your closest friends are, and Facebook's algorithm can't always accurately predict who you want to chat with.