The effectiveness and timeframe for Facebook and Instagram Ads to yield results can vary based on factors such as industry, campaign objectives, and targeting. While some businesses may see immediate engagement and conversions, others might require a few weeks to build momentum. It’s essential to optimize your ad strategy over time, closely monitor performance metrics, and refine targeting based on audience responses. Generally, a testing period of 2-4 weeks is recommended to gather enough data for informed decision-making, but ongoing refinement and adaptation are key for sustained success with Facebook and Instagram Ads.