Idiom
keep tabs (on someone or something) and keep track (of someone or something)
Theme: MONITORING
to monitor someone or something; to follow the activities of someone or something. (Tabs can be replaced by tab.)I'm supposed to keep track of my books.Try to keep tabs on everyone who works for you.It's hard to keep tabs when you have a lot of other work to do.I can't keep track of the money I earn. Maybe someone else is spending it.