Belgian side Union Saint-Gilloise are the visitors to Ibrox for the final match, with Rangers still in with a chance of automatic qualification to the round of 16 depending on results elsewhere.
However, Butland says the squad will remain focused on their job and go out in search of a victory.
Speaking to the media at this afternoon’s pre-match press conference, he said: “These are the games that you want to be a part of, and these are the competitions you want to be in the final stages of.
"We’ll either look forward to the play-off round or we’ll look forward to the knockout stage. Either way, the focus is on winning the game tomorrow.
“We have to continue to improve, we have to even look at games like Old Trafford and look at where we can improve in situations.
"We will look at the game from the weekend, we put in a really good second half performance, but we can't settle and be comfortable with the performances we put in. We have got to keep looking to be better.
“Say what you like about this squad, we are not satisfied even going to Old Trafford last Thursday, it was not a case of ‘oh we put on a good performance we can be happy with ourselves’.
“In the days after it we looked back on it but in the moment, we were gutted that we didn’t get the result and one that we deserved so I think that shows the mentality of the squad.”
Butland returned for last Thursday’s UEFA Europa League match against Manchester United after a leg injury which kept him out for a month.
When asked about the time out of the team, he continued: “It is never nice to be away from the team just on a personal note playing or not, it is just never nice to be injured so I am glad that is behind me now and I am looking forward to it.
“It is a common injury that developed into the worst-case scenario, so it was a really sudden and unexpected thing and one that we got on top of very quickly thankfully.
“The doctors and the physios here as well as the guys at the Queen Elizabeth Hospital were brilliant and I probably made a faster recovery than expected so that is credit to all the guys that have helped out and me doing everything I possibly could to get back as quickly as I could.
“It was a recurrence of an injury from five days before, so to anyone familiar with a dead leg it sounds quite innocuous at times but essentially it is an internal bleed.
“I had hit it again so it ended up bleeding and not stopping so it grew and grew and the pressure in my leg grew so it can get scary at that point that is why hospital was involved.”
Butland was asked about his own goal at Old Trafford, and how a moment like that in a game can impact a goalkeeper.
He added: “You are always going to get that, the life of a keeper is a very unforgiving one.
“When you are a young keeper you think you are never going to make a mistake and you think it is the end of the world when you do. The reality is there's not a player alive, a person alive that has never made a mistake before. What you do have to think about is how they happen, why they happen.
“If those things happen while you are trying to do the right things, when you are trying to be positive and when you feel like you've made the right decision then you just have to take it on the chin and move on.”