A few questions about Chat Memory

1. How exactly does Chat Memory works?

2. If I were to start a new chat in the same bot, would I be able to use the saved messages and continue on from there?

For example, I saved 100 messages from a chat because the tab is starting to lag. And then, I start a new one. Can I use that Chat Memory and continue on from where I left off?

3. What's the limit of the Chat Memory? Like, how many messages can it save?