The news XRP holders are waiting for. It's finally done.
Here’s how the escrow works:
The Escrow feature in the XRP Ledger allows parties to secure XRP for an allotted amount of time or until specific conditions are met. For example, Escrow allows a sender of XRP to put conditions on exactly when a payment can be completed, so the payment remains cryptographically locked until the due date.
We use Escrow to establish 55 contracts of 1 billion XRP each that will expire on the first day of every month from months 0 to 54. As each contract expires, the XRP will become available for Ripple’s use. You can expect us to continue to use XRP for incentives to market makers who offer tighter spreads for payments and selling XRP to institutional investors.
We’ll then return whatever is unused at the end of each month to the back of the escrow rotation. For example, if 500M XRP remain unspent at the end of the first month, those 500M XRP will be placed into a new escrow account set to expire in month 55. For comparison, Ripple has sold on average 300M XRP per month for the past 18 months.
Ripple’s vision remains the same – to enable the Internet of Value in which money moves like information moves today – and XRP is at the heart.
Source: https://ripple.com/insights/ripple-escrows-55-billion-xrp-for-supply-predictability/