WASHINGTON -- Special counsel Robert Mueller charged 13 Russians and three Russian companies on Friday with interfering in the 2016 election by assuming U.S. identities, sowing discord on social media, communicating with unwitting Americans and even setting up political rallies from afar. President Donald Trump tweeted that the indictment proves there was "no collusion!" with Russia. The White House repeated that point, sending out a statement with "Trump responds to indictment of 13 Russians: "no collusion!"" in all caps.

What does the indictment mean for Mr. Trump?

Here are a few key takeaways from the indictment:

What were the charges?

The indictment alleges that starting in 2014, the Russian Internet Research Agency tried to disrupt the U.S. political system and sow discord by stealing U.S. identities and falsely claiming to be U.S. activists. Specifically, the indictment charges the individuals with conspiring "to obstruct the lawful functions of the United States government through fraud and deceit," by making illegal campaign expenditures, failing to register as foreign agents and using false statements to try and obtain visas. Some are also charged with wire fraud and identity theft.

Get Breaking News Delivered to Your Inbox

By early to mid-2016, the indictment says, their efforts included supporting President Donald Trump's campaign and disparaging Democrat Hillary Clinton.

The indictment says the Internet Research Agency was funded by Yevgeny Prigozhin, a St. Petersburg businessman dubbed "Putin's chef" because his restaurants and catering businesses once hosted the Kremlin leader's dinners with foreign dignitaries. It was also funded by companies he controlled, it alleges.

"What investigators are alleging in this indictment is that through this Internet Research Agency, the organization was able to influence events here in the U.S. by using social media to, for example, set up fake protests, in some cases, for and against Trump. Or against other candidates in the 2016 election," CBS News' Jeff Pegues said Friday.

Deputy Attorney General Rod Rosenstein said the indictment is a reminder that "people are not always who they appear to be."

"Unwitting" individuals

Mr. Trump is right that there is no evidence of collusion in the indictment that was announced Friday. It doesn't mention collusion at all. But that doesn't mean the matter is settled, because Mueller's investigation is continuing.

Mueller is still looking into any possible financial transactions between the Trump campaign and Russia -- and speaking to witnesses about the question of obstruction of justice. "Earlier this week, [Mueller] spoke with former chief strategist Steve Bannon and just yesterday, interviewed former legal team spokesman Mark Corallo," said CBS News' Paula Reid. "So despite these claims from the White House that this is all wrapping up soon ... this is going to last well into this year and probably into next."

Along with several congressional investigations, Mueller's investigation began with the question of whether anyone on Mr. Trump's campaign colluded with Russians who meddled in the 2016 campaign. The indictment released Friday doesn't include any evidence that they did.

It alleges that on at least three instances, Russians using false U.S. personas contacted campaign officials associated with Trump's campaign in Florida. Those officials are identified as "Campaign Official 1, Campaign Official 2 and Campaign Official 3."

The indictment doesn't say if any of them responded, and Deputy Attorney General Rod Rosenstein said in a news conference shortly after it was released that "there is no allegation in this indictment that any American was a knowing participant in this illegal activity."

Rosenstein noted that the Russians "took extraordinary steps to make it appear that they were ordinary American political activists."

Impact on election results?

Mueller's indictment doesn't mention the possible impact of the Russian effort. Deputy Attorney General Rod Rosenstein said in a press conference announcing the charges that "there is no allegation in the indictment that the charged conduct altered the outcome of the 2016 election."

Mr. Trump went further in a tweet Friday, writing: "Russia started their anti-US campaign in 2014, long before I announced that I would run for President. The results of the election were not impacted."

Though some Democrats have opined that Russian interference could have swayed the results, there's been no evidence that it did. In an assessment after the election, the U.S. intelligence community described a Russian government effort to interfere on Mr. Trump's behalf. But they didn't assert that it swayed the election.

Who were the Russians helping?

Most of the Russian election efforts detailed in the indictment are to help Mr. Trump's campaign, though the document is carefully worded, saying that their operations "included" supporting Mr. Trump and disparaging Clinton.

The indictment also alleges that the Russians tried to denigrate Sens. Ted Cruz and Marco Rubio, who ran against Mr. Trump in the GOP primary, and to support Sen. Bernie Sanders, who was running against Clinton in the Democratic primary.

According to one internal communication detailed in the indictment, the specialists were instructed to "use any opportunity to criticize Hillary and the rest (except Sanders and Trump - we support them)."

And according to one internal review, a specialist was criticized for having a low number of posts criticizing Clinton. The person was told "it is imperative to intensify criticizing Hillary Clinton" in future posts.

After the election, the indictment alleges that the Russians organized rallies both in favor of and opposing Mr. Trump.

An elaborate plan

The indictment alleges detailed, intricate plans to wage what the Russians called "information warfare" against the United States.

Beyond detailed efforts to appear as Americans through emails and social media posts, and organizing real rallies, at least two of those charged actually traveled to the United States and visited several states, posing as political activists.

They also paid Americans to carry out their objectives. Ahead of a Florida rally, the Russians asked one person to build a cage on a flatbed truck and another to wear a costume portraying Clinton in a prison uniform, according to the indictment.

The indictment says, "Defendants and their co-conspirators paid these individuals to complete the requests."

Speaking Saturday, U.S. President Donald Trump's national security adviser told an international audience that the evidence of Russian meddling in the 2016 American election is beyond dispute. H.R. McMaster was answering a question from a Russian delegate, shortly after Russian Foreign Minister Sergey Lavrov left the same stage at the Munich Security Conference on Saturday.

Referring to the indictment of 13 Russians, McMaster said "with the FBI indictment, the evidence is now incontrovertible" of Russia cyber-meddling. He also scoffed at any move to work with Russia on cybersecurity, saying "we would love to have a cyber dialogue when Russia is sincere about curtailing its sophisticated form of espionage."

Lavrov, just moments earlier, had dismissed the indictments as "just blabber" through an interpreter.

"Until we see the facts, everything else is just blabber -- I'm sorry for this expression," Lavrov said.