The term used to describe this type of symbiotic relationship is commensalism. In commensalism, one organism benefits while the other remains unaffected.
For instance, consider barnacles that attach to the shell of a turtle. The barnacles gain a safe and stable place to live, gaining access to nutrient-rich water as the turtle swims. Meanwhile, the turtle is not impacted by the presence of the barnacles, neither helped nor harmed. This illustrates how commensalism operates in nature, highlighting the various ways organisms interact within ecosystems.