Installing Cinema 4D 26 and later will also install the Redshift release certified for use with that version of Cinema 4D. Because Redshift publishes new releases much more frequently than Cinema 4D, a newer Redshift release may be available. You're welcome to install that release via Maxon App or the Redshift installer and take advantage of newer features and fixes, but fewer quality checks are performed with these incremental releases.
In cases where Cinema 4D is installed by one of our partners (for example with Adobe After Effects), Redshift may not be included. In those cases you'll see an option to "Install Missing Components" within Maxon App which will patch your installation to include Redshift.