what does conosco mean?
Hola! I think you may be referring to "conozco". This is the "yo" form of the verb conocer. Conocer means "to know" [not information because that is saber, but instead it means "to know" a person or be familiar with a place].
Therefore, "si no la conozco" means "if I don't know her" and if you meant "sí no la conozco", that means "yes, I don't know her".
Good question...I hope I helped
It is a common way (on the internet, texts, chat, etc.) to spell "conozco", the present tense "yo" form of the verb "conocer". However, it should be spelled with the "z" in formal settings.
If you don't know her. Conozco is the first person congugation of the verb conocer to know or to become aquainted for example Conozco a mi mujer en una sala de bailer. I met my wife in a dance hall. ¿Conoces un buen bar? Do you know a good bar?
The la does not have to refer to a female.
The phrase could be «if I am not familiar with it» (the it being anything feminine in gender).