It seems like you’re referring to a service or tool called “Load Metrics” that uses 28 credits for keywords. If this involves a specific platform or application related to analytics, SEO, or similar services, it typically means that the service allocates or consumes credits based on the number of keywords you are tracking or analyzing.
Credits are often used as a unit of measurement or currency within such tools to manage usage limits or access to features. Each action or query (like tracking a keyword) may deduct a certain number of credits from your account.
If you have specific questions about how these credits are used, their renewal, or any other related details, it would be best to consult the documentation or support resources provided by Load Metrics or the specific platform you are using.