Mueller admits that there was no collusion.
https://www.bbc.com/news/world-us-canada-46490804
The key elements of the memo are about the Russian links. They are that Cohen:
Spoke to "a Russian national who claimed to be a 'trusted person' in the Russian Federation who could offer the campaign 'political synergy' and 'synergy on a government level'". This person proposed a meeting between Individual 1 (previously identified by Cohen as Mr Trump) and the Russian president, saying it could have a "phenomenal" impact "not only in political but in a business dimension as well".
The meeting did not take place.