Meta Ads Manager is the designated, all-in-one tool for creating and managing advertising campaigns across Meta's platforms, including Facebook, Instagram, and Messenger. It provides a comprehensive interface where advertisers can set up the entire campaign structure, from selecting an objective and defining a target audience to setting budgets and designing the ad creative. While Business Manager is used to organize and manage business assets like ad accounts, the actual campaign creation and editing process is performed within Ads Manager.

A. A personal Facebook profile is for individual, non-commercial use and does not have the functionality to create ad campaigns.

B. Messenger is a messaging platform that can be used as an ad placement, but it is not the tool used to build or manage campaigns.

C. Business Manager is a central hub for managing business assets (Pages, ad accounts, people), but the specific tool for campaign creation within it is Ads Manager.

1. Meta Business Help Center, "About Ads Manager." This document states, "Ads Manager is your starting point for running ads on Facebook, Instagram, Messenger or Audience Network. It’s an all-in-one tool for creating ads, managing when and where they’ll run and tracking how well your campaigns are performing..." (Source: Meta Official Documentation).

2. Meta Business Help Center, "Create a campaign in Ads Manager." The guide explicitly outlines the step-by-step process for building a campaign, and all actions described take place within the Ads Manager interface. The first step listed is "Go to Ads Manager." (Source: Meta Official Documentation).

3. Meta Business Help Center, "About Meta Business Suite and Business Manager." This resource clarifies the role of Business Manager as a management tool, stating its purpose is to "Keep your business activities separate from your personal profile" and "Manage access to your Pages and ad accounts." It distinguishes its function from the campaign creation role of Ads Manager. (Source: Meta Official Documentation).