This is the 36th most frequent Russian word.
и
"And."
The word 'и' connects two actions, showing their simultaneous preference.
Я люблю читать книги и слушать музыку.
I love to read books and listen to music.
The word 'и' connects two adjectives describing the room.
Здесь светло и тепло.
It's bright and warm here.
The word 'и' connects two sequential actions forming a logical storyline.