It's often used to describe the spiciness of food, especially in relation to chili peppers.
For example, you might say:
* "Ei bhoj jhal beshi" - "This food is too spicy".
* "Ami jhal khetei parchhi na" - "I can't eat spicy food".
* "Jhal diyeo bhalo lagche" - "It tastes good even with spice".