'substitution operator :s in VIM in unix [duplicate]

In unix, while using VIM and the substitue command I am unable to replace the value to a string containing special character /

 :%s/var1/"ab1/ab2/ab3"/g

I need to replace the entire file containing var1 with ab1/ab2/ab3

Output in vim I see: Trailing characters

unix vim substitution

Solution 1:^[1]

Escape both / like so \/.....

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Solution	Source
Solution 1	Bib