Before implementing marketing campaigns or rolling out those paid ads, you must define your specific objectives and corresponding KPIs.
You should establish KPIs to accurately track your success or measure the effectiveness of your efforts.
Some examples of KPIs and metrics you can set up and monitor for digital marketing campaigns can include:

1. Click-Through Rate (CT): The percentage of users that click on a link or call to action.
2. Cost Per Lead (CPL): The average amount you pay to acquire one lead through digital marketing efforts.
3. Conversion Rate: The rate visitors convert into customers or complete desired actions such as email subscribing.
4. Return on Investment (ROI): The ratio of revenue generated to the cost of campaigns in digital marketing efforts.
5. Social Media Engagement: The average number of likes, shares, and comments across your social media channels.
6. Website Traffic: The total amount of web traffic your website generates over a certain period.
7. Email Open Rate: Email open rate measures the percentage of people who open your emails.
8. Bounce Rate: Bounce rate is a metric that calculates the percentage of visitors who exit a website after exploring only one webpage.
METRICS