This is the 630th most frequent Russian word.
добавить
To add.
The verb "добавить" here is used in its primary sense, meaning "to add" something to a mixture or total.
Мне нужно добавить немного соли в суп.
I need to add some salt to the soup.
In this context, "добавить" refers to including something in a collection or system.
Можно добавить ваши контакты в наш список рассылки?
Can we add your contacts to our mailing list?
Here, "добавить" is used to mean "to incorporate information or details" into a communication.