This is the 4729th most frequent German word.
wesentlichen
"Essential" or "fundamental."
Here, 'wesentlichen' is used as an adjective to describe 'Punkte', meaning 'essential' or 'core'.
Die wesentlichen Punkte des Berichts sind klar dargestellt.
The essential points of the report are clearly presented.
In this sentence, 'wesentlichen' is part of the phrase 'Im Wesentlichen', which functions as an adverbial expression meaning 'essentially' or 'in essence'.
Im Wesentlichen stimmen die Ansichten überein.
Essentially, the views agree.
'Wesentlichen' is used attributively here, modifying 'Aspekte', indicating 'key' or 'major' aspects, showing the selective importance.