With two goals from just 13 Premier League matches across two seasons with Chelsea, Salah felt he had a point to prove on his return.
He expressed his desire to show how much of a better player he had become after a spell in Serie A.
"Everything [has improved]," he told the club's official website, comparing himself to when at Chelsea. "Even my personality was different, I was a kid – I was 20 or 21.
"Now I'm four years older, everything is different."
The Egypt international proved his point with an extraordinary debut season at Anfield.
Salah scored 32 Premier League goals in 2017/18, a competition record for a 38-match campaign.
His exploits helped Liverpool finish fourth and reach the UEFA Champions League final.
He also won the Golden Boot and was named EA SPORTS Player of the Season, adding to his Football Writers’ Association award.