This is the 12459th most frequent German word.
vorträgen
"Vorträgen" means "to present" or "to give a lecture/performance."
Here, 'Vorträge' functions as the plural noun form, referring to speeches or lectures presented.
Er hat gestern zwei beeindruckende Vorträge über Umweltschutz gehalten.
He gave two impressive lectures on environmental protection yesterday.
Here, 'Vortrag' is a singular noun, meaning a lecture or talk, referencing an upcoming presentation.
Sie ist nervös vor dem Vortrag, den sie morgen halten muss.
She is nervous about the lecture she has to give tomorrow.
In this context, 'vortragen' is the verb form, meaning 'to present' or 'to deliver', indicating the act of delivering information orally.