In the ILO publication "Care work and Care Jobs: For the Future of Decent Work," care work is "broadly defined as consisting of activities and relations involved in meeting physical, psychological and emotional needs" of any
individual, regardless of their age or other characteristics. The report further notes that there are two overarching types of care work: "direct, face-to-face, personal care activities (sometimes referred to as “nurturing” or “relational” care), such as feeding a baby, nursing a sick partner, helping an older person to take a bath, carrying out health check-ups or teaching young children" and "indirect care activities, which do not entail face-to-face personal care, such as cleaning, cooking, doing the laundry and other household maintenance tasks (sometimes referred to as “non-relational care” or “household work”)." Care work can be paid or unpaid.
Source: ILO 2018, pg. 6; https://www.ilo.org/wcmsp5/groups/public/---dgreports/---dcomm/---publ/documents/publication/wcms_633135.pdf
To learn more, see the activity report from the 11th Gathering of the Parliamentary Network for Gender Equality on achieving balance in the world of work and the 2020 CIM publication "COVID-19 in Women’s Lives: The Global Care Emergency" (2020). An executive summary of the ILO publication referenced above is also available at this link.