This is the 12466th most frequent Russian word.
кладете
"Кладете" means "you put" or "you are putting" (formal or plural).
Here, 'кладете' is the verb in the present tense, describing the action of placing something, specifically the book, onto the table.
Вы кладете книгу на стол.
You are putting the book on the table.
In this sentence, 'кладете' is used in a question form to inquire about the regular action of adding sugar to tea.
Кладете ли вы сахар в чай?
Do you put sugar in your tea?
Here, 'кладете' is part of a temporal clause indicating the action of placing keys on a shelf as a conditional or habitual act.