No, OP is definitely talking about park factors:
Ballpark Factors
The Ballpark Factors section directly impacts how hitters perform in the selected ballpark, over a large sample size. Ballpark Factors are extremely important, as they directly affect the outcome of plays in a given park.
Ballpark factors are based on a "norm" of 1.000. That is, a ballpark with all 1.000 factors is essentially a "neutral" park where hitters will all perform similarly. As the numbers increase, that factor becomes more common. So, for example, if your AVG Overall factor is 1.100, you can expect that if you had identical players in this park and a neutral park, the player in the park with the 1.100 AVG Overall factor would have a slightly higher average.
The modifiers are not straight percentages. So, a 2.000 doesn't mean you will do "twice as well."
http://manuals.ootpdevelopments.com/..._page.overview