The Nigeria international appeared to be on the verge of an exit during Jose Mourinho’s second spell in charge of the west London side.
However, Conte utilised the former Liverpool FC midfielder at right wing-back as past of Chelsea’s acclaimed 3-4-3 formation.
Moses scored three goals and made two assists in 34 appearances in the Premier League in their title-winning campaign in 2016-17.
The versatile Chelsea full-back has endured an injury-hit start to the Premier League campaign to force Conte to reshuffle his defensive options.
The African’s return to the Blues side has prompted Chelsea to win their last two top-flight fixtures over Swansea City and Newcastle United.
Moses created two of Chelsea’s three goals in a 3-1 win over Rafael Benitez’s Magpies outfit.
Former Chelsea midfielder Lampard believes Moses is one of Conte’s most important players due to balance that he brings to the Blues team.
“One thing I would say about Moses is that he’s a key player,” Lampard told BT Sport.
“Not critical as such, but positionally it’s been a problem [for Chelsea without him] because they’ve had the conundrum of moving Azpilicueta out there.
“He’s been fantastic on the right side of a three. Zappacosta is fit and playing well and so now they’ve got that steadiness and that balance which we saw last year, but not so much this year.”
Chelsea finished seven points clear of second-placed Tottenham Hotspur in the Premier League to secure their second title in their past three seasons.
The Blues lost 2-1 to title rivals Arsenal in the FA Cup final at Wembley back in May.
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