This is the 857th most frequent Russian word.
виталий
The Russian word "Виталий" is a male given name, equivalent to "Vitaly" in English.
In this sentence, 'Виталий' is used as a proper noun, referring to the person's name.
Виталий любит играть в шахматы.
Vitaliy loves playing chess.
'Виталий' is used here as a noun referring to the name itself.
Имя Виталий довольно популярно в России.
The name Vitaliy is quite popular in Russia.
Here, 'Виталий' is again a proper noun, signifying the person who performed the action of returning home.