The Reds host Newcastle United at Anfield on Saturday afternoon, with just a two-point lead over fourth-placed Tottenham Hotspur and four points ahead of Chelsea in the race to qualify for next season's Champions League.
Salah, who has scored 25 goals in the Premier League in his debut Reds season, insists Liverpool deserve to seal a top-four finish given their impressive displays under Jurgen Klopp so far this campaign.
"We must finish in the top four, it is not optional, we have to work hard and fight for it," he said.
"We have fantastic players, manager and fans, everyone deserves it."
The forward was keen to highlight the club's fans and their support for the Egyptian this season.
"The atmosphere is unbelievable," said Salah. "When I was here four years ago, I played against Liverpool and I said, 'One day, I have to play here.' The fans are fantastic and that is what I can say.
"From day one, I feel the support and that they like me, so I have to give more to make them happy. Every day I see and feel that, even in the warm-up, so it is a fantastic atmosphere.
"I am happy to hear that every game [the fans' songs for him] and feel the love of the fans. I am happy about everything right now."
The Egypt international joined Chelsea in 2013 from FC Basel and is determined to prove a point to the English media after he was labelled a flop when he left for Fiorentina on loan in 2015 and subsequently to Italian side AS Roma.
"Since I left the Premier League the first time, I wanted to come back," Salah said. "I love to play in the Premier League, I enjoy the football.
"I did not have a chance to play at Chelsea, but when I had the chance here, I am trying to show everyone my football.
"But I honestly learned a lot at Chelsea, it was not an easy time for me, but I am here now and happy about that."
On his manager Klopp, Salah added: "He [Klopp] helped me to improve myself and to do what I am doing now, so I am happy about that.
"We change the system every game, so sometimes I play second striker and sometimes I play on the right and sometimes I play on the left.
"I have the freedom to do whatever I want, but we are 11 players, so I have to defend, do my work, attack, defend, everything!
"I always start on the right, and we change during the game. Sometimes we play 4-4-1-1, 4-4-2 and I play second striker or I play striker.
"So it depends on the game and what the manager wants."