From CNN's Jeremy Herb, Lauren del Valle and Kara Scannell in the courthouse
To underscore the point to the jury, prosecutor Joshua Steinglass asked David Pecker a series of questions about what he offered to do.
He asked Pecker to confirm that he offered to publish positive stories about Trump, publish negative stories about his opponents and alert him about damaging information involving women.
To each question, Pecker answered "yes."
Pecker testified, "I think it was a mutual benefit. It would help his campaign, and it would also help me."
David Pecker continued to recall what he offered Donald Trump in the August 2015 meeting.
"Anything that I hear in the marketplace — if I hear anything negative about yourself or if I hear anything about women selling stories, I would notify Michael Cohen as I did over the last several years," Pecker said.
"And Michael Cohen — then he would be able to have them killed in another magazine or have them not be published or somebody would have to purchase them," he added.
Pecker explained why he raised women at the meeting.
"In a presidential campaign, I was the person that thought that there would be a lot of women would come out to try to sell their stories, because Mr. Trump was well known as the most eligible bachelor, and dated the most beautiful women," Pecker says.
From CNN's Maureen Chowdhury
Former tabloid executive David Pecker's testimony is an important part of the hush money trial because he says he witnessed Donald Trump signing invoices and checks, CNN senior legal analyst Elie Hong said.
"David Pecker said, 'I saw, with my own eyes, Donald Trump's assistant would bring him invoices and checks, he would look at them and sign them,'" Honig noted, adding that one of the key questions of this hush money case is the falsification of business records.
"Did Donald Trump know that the payment system was set up in this way? Know that it was structured as 'legal fees' or did he do what some CEO's do" and just sign whatever his assistant brought to him," Honig said.
The prosecution is also showing that Pecker was close to the former president, CNN's Phil Mattingly explained.
“They are using David Pecker as the vehicle into painting the picture of Trump’s world. A world in which Michael Cohen was the point of contact for David Pecker, who was very close to the former president,” Mattingly said.
Donald Trump is looking toward David Pecker but not reacting as the former tabloid executive discusses what he agreed to do at the meeting.
Describing the 2015 Trump Tower meeting, David Pecker said:
"At the meeting, Donald Trump and Michael (Cohen), they asked me, what can I do, and what my magazines could do, to help the campaign?"
Pecker said he "would be your eyes and ears."
"What I would do is I would run or publish positive stories about Mr. Trump and I would publish negative stories about his opponents and I said that I would also … be eyes and ears. I said I would be your eyes and ears," Pecker testified.
Prosecutor Joshua Steinglass is now asking David Pecker about the August 2015 meeting in Trump Tower with Michael Cohen and Donald Trump.
"I received a call from Michael Cohen saying the boss wanted to see me," Pecker said.
Hope Hicks was in and out of the meeting, Pecker says.
Prosecutors have submitted an email from Michael Cohen as evidence.
On June 2, 2015, Cohen personally invited David Pecker to Donald Trump's campaign announcement event.
In the email, Cohen asks Pecker to attend the event.
"No one deserves to be there more than you," the email says.
"As a friend, I would love if you could make it. Let me know so I can save you a seat next to me on the atrium floor," the email says.
David Pecker says that he attended Donald Trump's presidential campaign announcement in June 2015.
Trump is watching Pecker as he testifies about being invited by Michael Cohen to attend the announcement at Trump Tower.
After Donald Trump's campaign for president began in 2015, David Pecker said interest in Trump through his magazines "skyrocketed."
Pecker said they did research on potential covers to see what would sell the best. It was Trump, viewed "as the boss" in a boardroom, Pecker said.
