The phrase "suction settings" refers to the options or levels of suction power that can be adjusted on a device or machine, such as a vacuum cleaner or medical equipment, to control the strength of the suction. Full definition
It comes with three different modes, and various different suction settings to help make things run as smoothly as possible. (momming.com)
It is not usually necessary to pump at the highest suction setting. (cindyandjana.com)
You can use it as a single or a double pump, and you can adjust suction settings as needed, making it a pump that suits everyone's individual needs. (babygearspecialist.com)