How should KPIs be selected for an influencer marketing campaign based on the marketing funnel?

KPIs (Key Performance Indicators) must align with the specific stage of the marketing funnel the campaign targets because different funnel stages have distinct objectives. For example, a campaign focused on the "awareness" stage might prioritize KPIs like reach and impressions, while a "conversion" stage campaign would focus on sales or leads. Basing KPIs on the budget is incorrect because budget dictates resources, not campaign goals. Focusing on product design aspects is irrelevant to campaign performance measurement. Measuring influencer popularity is a metric for influencer selection, not a primary KPI for campaign success across all funnel stages.