App Type
Personal API Key
Personal API keys should be used for products that are intended for just the developer or a small group of users, and are usually a good place to start once your project has been developed.
These applications require less detail when registering, but won't be able to apply for an increased rate-limit.
Production API Key
To ensure the security and scalability of your product, it's recommended to use Production API keys for projects that cater to a large user base of the general public.
These keys necessitate a thorough description of your product to enable efficient and secure integration with the API and need to be reviewed before they can be used with the API.
Production applications may request increased rate limits, but sufficient detail is required to ensure the increase is required.