Webhooks are how web applications communicate with each other. Every day, we use dozens of applications across our smart devices, meaning we share data with a variety of programs and software. Webhooks are used to link these apps together by automatically transferring our information between them.
Also known as reverse APIs, webhooks are lines of code built into the URLs of frequently used apps. These lines of code take note of the information it is programmed to find and create a link that can be tracked across other apps. This information can then be relayed to the user to aid them in their services.
An example of a webhook can be found in any subscription service that charges users a fee. The service will have a webhook that stores a note in banks' servers to inform their email service whenever a user's card is charged. This note will contain a packet of data, such as the date and value of the charge. The webhook simultaneously updates the banks, the service, and the customer that the charge has been applied.
Webhooks can be applied to any number of apps for any number of data pulls. Ultimately, they serve the purpose of keeping everything a person uses up to date instantaneously.