This is the 3636th most frequent Spanish word.
mostrará
"Will show."
'Mostrará' is used here as the future tense of the verb 'mostrar', meaning 'to show', indicating an action that will take place in the future, performed by 'ella' (she).
Ella te mostrará cómo hacerlo.
She will show you how to do it.
'Mostrará' specifies a future action attributed to 'el libro' (the book), presenting the information contained within.
El libro mostrará los datos necesarios para el estudio.
The book will show the necessary data for the study.
Here, 'mostrará' indicates future guidance provided by 'el mapa' (the map) for navigation.