Campaign priority is a powerful tool that many advertisers use to increase the likelihood of their ads showing up in searches. For instance, if you have a top-tier account and want to show your ad on top of all others in search results, then you can set the campaign’s priority to “1.”
Lower tier accounts will need to spend more money than this if they want their ads at the top of search results. This is a great way to get your ads in front of more people, but it does come with an increased cost.” – Google In order for campaign priority to work properly, you need to use the same targeting options as well as location settings on both campaigns.
Another potential upside for setting high-priority campaigns includes when customers search for queries like “best product” or “product reviews”; these searches might indicate customer intent which means that those who choose to.