[Description] The Networks setting indicates where you want your ad to appear based upon the campaign type you chose. For example, with the Google Search Network, your ad can appear on Google search sites and non-Google search sites (like AOL) that partner with Google to show search ads, called search partners. With the Google Display Network, your ad shows on other sites that partner with Google to show ads. To change your Networks, you’ll need to change your campaign type or create a new campaign. [Learn more] Search Network Display Network [Setting] 
Networks