The google/apiclient-services is a PHP client library for Google APIs. Being a vital component of the Google API PHP client releases, this package is critical for PHP developers interacting with Google APIs. Regularly updated on a daily basis to accommodate changes in the API, and tagged weekly, the apiclient-services is incredibly handy for keeping your application current with Google's modifications.
To leverage the power of google/apiclient-services, you should use it as part of the Google API PHP client library. First, you need to install the parent library through Composer, which will subsequently fetch the most recent tag of google/apiclient-services. The code usage example can be something as follows:
composer require google/apiclient:^2.0
This command will install the Google API PHP client library, which comprises the google/apiclient-services.
Unfortunately, the readme does not provide a link to the google/apiclient-services documentation. However, you can find extensive information on how to use the various Google API PHP client services in the Google cloud packages documentation and in the main Google API PHP client releases page on GitHub.