CI/CD is the automated path a code change travels before it ships. CI means continuous integration: does this change fit with the rest of the code? CD means continuous delivery or deployment: once it passes, can it ship? A typical flow: a change lands in git, a pull request opens, the pipeline runs the tests, builds, and publishes if everything passes. Nobody has to remember every step.
An assembly line with inspection stations captures it. A product moves down the line: one station checks parts, one runs a quality test, one packages, one ships. If something fails inspection, the line stops before the bad product reaches the customer.
Why you care
If an agent changes code, you want a repeatable inspection line before that code becomes a deployment. The pipeline only catches what you told it to catch, so an untested bug can still slip through and a bad release may still need a rollback. It still gives you a calmer question to ask: did the change pass the line? Shipping should be a checked path rather than a remembered ritual.