The phrase "a major booster" is correct and usable in written English.
It can be used to describe something that significantly enhances or promotes a particular outcome or situation.
Example: "The new marketing strategy has proven to be a major booster for our sales this quarter."
Alternatives: "a significant enhancer" or "a key driver".
Kristol became a major booster of McCain's presidential bid, drawn by the senator's strong support for intervening in Kosovo.
But during the primaries, he was a major booster of Democrat Hillary Rodham Clinton, whom he also considers a friend.
While Mr. Martie is committed to adding amenities, he is at the same time a major booster of what is already there in the Penn Station area.
The stranger was Bill Navin, a lawyer and a major booster of his alma mater, Alfred University in upstate New York.
In past trips abroad, President Clinton has been a major booster of American business, inviting executives to travel with him and paying visits to American factories abroad.
Aside from owning nearly 17percentt of Innate Immunotherapeutics's stock, Mr. Collins was also a major booster for the company among his colleagues in Washington.
When his son responds, "That's a major mood booster," he cracks, "Well, I waited until you were old enough to handle it".
The Wisconsin program was tied into the violations because the shoe store owner was a major public booster of Badger teams.
Doug is a major civic booster; he has a pet project he thinks can help turn the town's fortunes around.
Three conservative sources tell the Guardian that the Adelson decision came after getting reassuring reports from a few longtime close allies, including the former House speaker Newt Gingrich, a major Trump booster and reportedly a potential vice-presidential candidate who has signaled his interest in the No 2 slot.
Zuberi's rapid transformation from one of Clinton's biggest fundraisers into a major Trump booster has drawn the attention of federal prosecutors in New York, who have homed in on the investor as part of a probe into the president's inaugural committee.
