The Anfield boss has preferred Moreno over Robertson since the Scotsman arrived on an £8million deal form Hull City in the summer, leaving the 23-year-old out of his matchday squad on 11 separate occasions.
Back in favour after some calamitous errors in the past, Moreno's improvement has seen him earn a Spain recall and he could win his first cap since March 2014 against Costa Rica on Saturday night.
Klopp believes the former Sevilla star's story is an example to players who, like Robertson, currently find themselves out of the first-team picture.
“The players can always do that,” the Liverpool manager said of Moreno’s revival. “If they have the quality they can win the fans back because we have no real idea about the games four or five weeks away.
"We are easy to convince in the moment. He did it now consistently which is really nice.
“I am happy for him because he had a very difficult situation last year. That’s how it was. We spoke before the last season what we wanted him to do differently. He needed a bit of time and now he is doing well. Hopefully he can do well in the future again because that’s how you show consistency.
“That’s the exact situation for Andy Robertson. People will say: ‘Why do you do that [sign Robertson], because he is here and not playing?’ Because he has to learn, but there is no problem. We are in conversation, talk about it and he has to improve."
Robertson impressed against Liverpool last season as he helped Hull City to a 2-0 win over Klopp's side in February and the German admits the summer signing probably expected to play a lot more.
He added: “He’s on a good way, a really good way. It’s going well apart from maybe he is not happy he cannot start so often as he would thought from the beginning. It’s all about improvement and then to be ready for the moment you are used.”