Docs Cart Stock Reservation Timer

Settings and the Stock holds screen

Settings are under WooCommerce, Settings, Stock Holds.

General settings: hold time, which products, what happens when time is up, and the restart rule.
SettingWhat it does
Hold timeMinutes the stock stays reserved after add to cart.
Which productsAll tracked products, only low stock (with your threshold), or only ticked products.
When time is upRemove the held items and return the stock, or keep the items without the hold.
Restart the timerStart a fresh timer whenever the shopper changes the cart.
DisplayCountdown on the cart, checkout and mini cart, its text and colours, the product page message and the messages when time is up.
AdvancedCleanup interval, roles that never get holds, and removing all data on uninstall.

WooCommerce, Stock holds

Every live hold with product, shopper, quantity, stock left and time left, plus the 30 day counters. Release returns the units straight away.