The phrase "half point" refers to a measurement or unit of measurement that is equal to half of something, usually a number or a whole point. It is used to describe a smaller or more precise value that falls between two whole numbers or points.
The research revealed that family firm board committees often benefit from a balance of points of view, including that of the controlling family. (rotman.utoronto.ca)
That's more than double their share of startup activity at points in the 1990s. (canadianbusiness.com)
For every 5 nights, you'll get the equivalent of one night's worth of points in discount. (upgradedpoints.com)