Are there examples of Russian “disinformation” on social media that tried to influence the last two US presidential elections?

I understand there were some hacks, like the 2016 Democratic National Committee email leak, but along with any citations of those few items are often watery assertions that "Russian disinformation campaigns" included social media activity. I envision a bunch of fake accounts on Twitter and Facebook posting fake stuff. Is that correct? Are there any examples of this? Any evidence of the gravity this activity might have had, on the elections or otherwise?

The following line from an AP article inspired the question:

Russia has tried to influence the last two presidential elections by boosting false stories and using social media to inflame divisions in American society on issues like race and the coronavirus pandemic.