Everton have signed Zouma on a season-long loan deal from Premier League rivals Chelsea in the summer transfer window.
The 23-year-old central defender - who earns £40,000 per week as salary, according to Spotrac.com - spent the 2017-18 season on loan at Stoke City, who got relegated from the Premier League to the Championship at the end of the 2017-18 campaign.
Former Everton striker Campbell has praised the signing of the France international by Marco Silva’s side.
Another player Everton signed in the summer transfer window is Colombia international central defender Yerry Mina.
Mina has moved to the Toffees from Spanish and European giants Barcelona this summer for a transfer fee reported by The Independent to be worth £27 million.
The 23-year-old central defender joined Barcelona only in the January transfer window.
Former Everton winger Pat Nevin believes that Mina is a good signing for the Merseyside outfit.
Nevin told BBC Sport: “It was defenders Everton needed and Mina is a massive buy, and I’m not just saying that because he’s 6’5.
“He scores goals too. A massive addition, they’ve had the same centre halves for quite a while.”