It's important to find the right key performance indicator that aligns with your business objectives and track them over time to determine whether your marketing efforts are having the desired effect.

There are several ways to measure the impact of your marketing efforts, including:
Tracking website traffic: Use tools like Google Analytics to see how many people are visiting your website, where they are coming from, and how long they are staying.
Measuring conversions: Use tools like Google Analytics to track how many people are completing specific actions on your website, such as filling out a contact form or making a purchase.
Surveying customers: Conduct surveys to gather feedback from your customers about their experience with your brand and the effectiveness of your marketing efforts.
Tracking sales: Use your sales data to see if there is a correlation between your marketing efforts and an increase in sales.
Monitoring social media: Use social media analytics tools to track the engagement and reach of your social media posts, and see how they are impacting your brand's online presence.