SEM success can be measured in a variety of ways, including the following:

1. Cost per click (CPC): This metric measures the average cost of a click on an ad. It’s important to keep this number as low as possible.

2. Cost per acquisition (CPA): This metric measures the average cost of converting a lead into a customer. It’s important to keep this number as low as possible.

3. Return on investment (ROI): This metric measures the amount of money earned from a campaign, divided by the amount of money spent. It’s important to keep this number as high as possible.

4. Click-through rate (CTR): This metric measures the percentage of people who click on an ad out of the total number of people who view it. It’s important to keep this number as high as possible.

5. Conversion rate: This metric measures the percentage of people who take a desired action after viewing an ad, such as making a purchase or signing up for a newsletter. It’s important to keep this number as high as possible.