This is the 1935th most frequent Spanish word.
recomendaciones
Suggestions or advice.
In this sentence, 'recomendaciones' is used to refer to pieces of advice or suggestions about certain topic, specifically books.
Ella me dio unas recomendaciones sobre libros que puedo leer.
She gave me some recommendations about books I can read.
Here, 'recomendaciones' is again used to denote suggestions or advice, but this time it's about language improvement.
¿Tienes algunas recomendaciones para mejorar mi español?
Do you have any recommendations for improving my Spanish?
In this case, 'recomendaciones' indicates professional advice or expert suggestions given for a specific aim, the project.