La eficacia de la campaña se mide por _____________, y el reconocimiento de marca se mide por _____________.

The correct answer is ACOS, impresiones. Campaign effectiveness is typically measured by ACOS (Advertising Cost of Sale), which indicates the profitability of your ad spend. A lower ACOS suggests a more effective campaign in terms of sales generated relative to advertising costs. Brand awareness, on the other hand, is commonly measured by impressions, which represent the number of times your ad was displayed. More impressions mean your brand was seen by more potential customers, contributing to increased recognition. ROAS (Return on Ad Spend) is similar to ACOS but calculated differently (revenue/ad spend), and while it measures effectiveness, ACOS is more directly tied to profitability for many advertisers.