The Steele dossier was a collection of raw intelligence reports. Minor details were proven wrong, such as Trump spending the night in a hotel but not in the presidential suite like the report claimed. Otherwise, multiple people claimed they could prove they hadn't done what was claimed but failed to do so or were later proved to have indeed done the things.

Nearly all of the claims have been proven broadly true by subsequent investigations.

It linked multiple members of his campaign to elements in and around the Russian government. Communication records later proved that contact has indeed taken place.

It claimed Russians had dirt on Trump from a pageant he hosted there. While no blackmail material has come out, one of the Russian contacts the campaign communicated with told them he had buried some for them.

The dossier claimed a Romanian hacking group operating at the direction of the Russian government was behind the Clinton leaks. It was later proven that it had been done by a Russian group pretending to be Romanian.

It was claimed that WikiLeaks was directly coordinating with both the Trump campaign and Russia to inflict maximum damage on Clinton and steer people toward Trump. Emails later came out that proved this.

These are just a handful of the verified claims.