What is the meaning of callouts in apex ?

Callouts in Apex are used to make external web service requests.

1. Batch - Callouts: Allowed in the execute method of a batch job, enabling integration with external services during batch processing.
2. Trigger - Callouts: Not recommended due to potential delays in transactions. Use asynchronous methods like @future or Queueable instead.
3. API - Callouts: External API requests made via Apex’s Http and HttpRequest classes to communicate with third-party systems.

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