How to pass context in Dagger?

Through a module that provides Context.

@Module
class AppModule(private val context: Context) {

    @Provides
    @Singleton
    fun provideContext(): Context {
        return context
    }

    // Other provide methods
}

Then this module is used when building the component:

@Singleton
@Component(modules = [AppModule::class])
interface AppComponent {
    // Injects
}

And the component is initialized with an instance of AppModule:

class App : Application() {

    lateinit var appComponent: AppComponent

    override fun onCreate() {
        super.onCreate()
        appComponent = DaggerAppComponent.builder()
            .appModule(AppModule(this)) // Passing the context here
            .build()
    }
}

Later, the context can be injected into any class that requires it:

class MyService @Inject constructor(private val context: Context) {
    // Use the context
}