Yes, it is frequently required that timings be in minutes and seconds. The shop guidelines will specify such and the timings will be input in the report. You will need an accurate timekeeper. It may be a stopwatch, or a watch with a lap timer function.
Fast food shops for example, require several timings. What time did you enter the line, how long before you were acknowledged, how long until you placed your order, how long until you received your order.
Restaurant shops may require time of seating, initial visit by the server, time of order and service of drinks, time until service of appetizers, first course, etc.
Grocery shops, what time did you enter the line, when were you acknowledged, when were you assisted? At checkout, time you entered the checkout line, time until your first item was scanned. . .
The list of shops requiring timings goes on and on. It is a critical element of what a shopper reports. It is essential to have a watch or other device that ensures accurate reporting.