This is the 8662nd most frequent Spanish word.
seguún
"Según" means "according to" in English.
In this sentence, 'según' is used to indicate the source of the statement; it specifies that the opinion being mentioned comes from the teacher.
Según mi profesor, este libro es muy bueno.
According to my teacher, this book is very good.
Here, 'según' is used to denote conformity or consistency with a schedule or standard.
El restaurante abrirá según su horario habitual.
The restaurant will open according to its usual schedule.
In this example, 'según' introduces a conditional dependence, stating that the action depends on the weather's condition.