This is the 8403rd most frequent Turkish word.
o
"He" / "She" / "It" / "That"
In this sentence, 'o' functions as a pronoun used to refer to a third person singular, which could be 'he', 'she', or 'it' based on the context.
O benim en iyi arkadaşım.
She/He/It is my best friend.
Here, 'o' is used as a pronoun to refer to an object that was on the table, 'it' in English.
O masanın üzerindeydi.
It was on the table.
In this example, 'o' specifies 'that' as in 'that day', showing a demonstrative pronoun usage.