You can send Google Ads traffic to any page on your site including sub-domains. However, there can only be one ad displayed for each domain on a Google search results page. This means that it isn't possible to have ads for both myshop.com/juliedobson and myshop.com/robstark on one search result page. If myshop.com is already running ads on Google then the only way for your ad to show is if you have a higher ad rank than them or you bid on keywords where they don't have coverage.
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