Skytake provides 3 types of urgency.

Visitor Session

Each visitor has an urgency session time. 
To enabled it, click on the Urgency tab and select visitor session from the urgency dropdown.

Expiry Date

Set a date when the campaign ends.
If Woocommerce coupon enabled, it will set the coupon expiry date.

Coupon Usage Limit (Woocommerce Only)

Set how many times the coupon will be used before it expires.
for more information please read this guide