springboard
noun [ C, usually singular ]
uk/ˈsprɪŋbɔːd/ ussomething that is a basis from which other things grow or develop:
a springboard for/to/into sth Manufacturing facilities abroad could be a springboard for our expansion in the market.
become/serve as/provide a springboard for (doing) sth
a springboard to do sth They intend to use the £150 million acquisition as a springboard to buy other food brands.