"Om" can be used in Dutch in sentences that contain "te" + the infinitive. It can be either mandatory or optional. Examples of sentences where "om" is mandatory: Het is nooit te laat om te veranderen. Ik deed het om hem te helpen. Ik rende naar de bushalte om de bus niet te missen. Examples of sentences where "om" is optional: Je moet me beloven (om) op tijd naar bed te gaan. Hij probeerde (om) de deur te openen. Zij beloofde (om) haar moeder te bellen.

In this case, it is an adverb, I believe. So if you want to attribute it to something it probably be to: to change. So 'om te veranderen' would be 'to change'. It is one of those difficult words in the Dutch language, you can use it in different sentences and it can mean something completely different. couple of examples: waar gaat het om? (what's it about?), je tijd is om (your time is up), om de hoek (around the corner). Hope this helps!