Plain-English definition
third-party service
What it means
A third-party service is a ready-made tool built by another company that you plug into your app so you don't have to build that feature from scratch. Things like sending texts, mapping locations, or processing payments are often handled this way.
In plain terms
Like hiring an outside caterer for a party instead of cooking every dish yourself: a specialist handles one job well while you focus on the rest.
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