To be about

Wednesday´s expression of the day!
to be about : tratar de / es sobre

Examples:
Finding Nemo is about a little fish that gets lost in the ocean.
(Buscando a Nemo se trata de un pequeño pez que se pierde en el océano.)

His email was about the meeting next week.
(Su correo electrónico era sobre la reunión de la próxima semana.)

Do you know what the meeting will be about?
(¿Sabes de que tratará la reunión?

What was the book about?
(¿ De que se trataba el libro?)

Can you use it? Try it, it´s a piece of cake!