This is the 5141st most frequent Swedish word.
d
The Swedish letter "d" represents the "d" sound and can also function as an abbreviation, such as "dag" (day).
Here, 'D' is used as an abbreviation for 'du', meaning 'you'.
Det är viktigare än du tror.
It is more important than you think.
In this case, 'D' is a casual abbreviation for 'Du ska', indicating 'You should'.
D ska vi ses på torget.
You should see us at the square.
This usage of 'D' can be a shorthand for referring to an object or concept in informal writing.