estimatedSettlePrice

Does anyone know what the purpose of the “estimatedSettlePrice” attr returned from the mark_price endpoint represent?
The comment in the docs is as follows, but it doesn’t tell me much…
“// Estimated Settle Price, only useful in the last hour before the settlement starts.”

Endpoint:
GET /fapi/v1/premiumIndex

It’s used to calculate the funding rate for the next 8 hours. Please read https://academy.binance.com/en/articles/what-are-perpetual-futures-contracts to understand what funding rate is