Reach in marketing refers to the measurement of the size of the audience that has seen your ads or campaign content. It is the number of unique viewers who see your digital content. Reach measures your actual audience, and marketing reach measures the potential customers a campaign could reach. It can refer to specific audience segments or to a broader percentage of the population. Reach is often calculated as the number of customers who have seen your ad at least once. Marketing reach refers to the estimated number of potential customers you can reach with the campaign. It is important not only because it measures the audience of your ads, but it can also help you analyze the effectiveness of the ads. By knowing the size of your audience, you can then determine what your goals for conversions and sales should be. Reach is one of many metrics that can help you with the analysis of your marketing campaigns.