I am working on bring the advertising data into adobe analytics by connecting my Google/Bing accounts but is there a way to hide or give access about the ad spend to only a few member and not the entire company.
An admin can control user access to advertising analytics.
Permission in Adobe Analytics
Permission in Adobe Experience Cloud
Advertising Analytics Management
Lets users set up/edit/view advertising search accounts.
Admin > User Management > Groups > Edit All Report Access > Customize Analytics Tools > Advertising Analytics Management
Log in to adminconsole.adobe.com > Products > Product Profile > Permissions tab > Analytics Tools > Advertising Analytics Management
Don't think you can hide/edit the "search engine" advertising standard template (having cost data in it) from all the users in Analysis Workspace. Advertising Analytics also adds the cost dimensions and metrics Reports & Analytics, Report Builder, and the Analytics Reporting API. So, in my opinion, the best way going forward is to give access to only a few members, not the entire company.