When setting up a bid strategy in Search Ads 360, your customer's main business goal is to determine how long it takes a user to purchase a pair of socks after selecting an ad. Which metric is important for them to follow?

Conversion delay, also known as time lag, measures the duration between a user's initial ad click and their subsequent conversion. This metric directly addresses the customer's goal of understanding how long it takes for a purchase to occur after an ad interaction. Target CPA (tCPA) focuses on the cost of acquiring a conversion, not the time taken. Learning period refers to the time a bid strategy needs to gather data and optimize, which is an internal system process, not a user behavior metric. Target ROAS (tROAS) prioritizes the return on investment from ad spend, not the time to conversion.