If you saw a product from a brand on a billboard on your commute, and a product from a brand you've never seen before, you'd probably be able to pick which one you've never seen before.
I might recognize a color theme or similar. I had a friend make a joke about a lawyer who was apparently on multiple billboards for years. The name didn't click at all, so he had to explain. I did notice later due to the joke priming me.
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If you asked me to name the companies on the billboards that line the highway I commute on, I couldn't do it.
I don't think any single form of advertising is effective on the whole population.
If you saw a product from a brand on a billboard on your commute, and a product from a brand you've never seen before, you'd probably be able to pick which one you've never seen before.
I might recognize a color theme or similar. I had a friend make a joke about a lawyer who was apparently on multiple billboards for years. The name didn't click at all, so he had to explain. I did notice later due to the joke priming me.