This is the 596th most frequent German word.
höher
"Höher" means "higher" in English.
In this comparative sentence, 'höher' is the comparative form of the adjective 'hoch' (high), comparing the relative heights of two objects.
Der Turm ist höher als das Gebäude daneben.
The tower is higher than the building next to it.
In this usage, 'höherer' is the comparative form of 'hoch' and is used metaphorically to describe education as being at a more advanced level.
Er strebt nach höherer Bildung.
He strives for higher education.
Here, 'höher' is again the comparative form of 'hoch', describing an area that is at a physically greater altitude.