How does Google measure store visits?

When users purchase online and then visit a store, Google attributes those store visits back to the online purchase and engagement.
When users see your ads and then visit your store, Google attributes those store visits back to the ad views
When users engage with your ads and then visit your store, Google attributes those store visits back to the ad engagements in a privacy-safe way.
When users make a purchase in store, Google attributes those store visits back to ad conversions.

The correct answer is:

When users engage with your ads and then visit your store, Google attributes those store visits back to the ad engagements in a privacy-safe way.