It tells you what the paragraph is going to be about.
An F1 hybrid (or filial 1 hybrid) is the first filial generation of offspring of distinctly different parental types. F1 hybrids are used in genetics, and in selective breeding, where it may appear as F1 crossbreed. The term is sometimes written with a subscript, as F1 hybrid.
Outlander PHEV is the only plug-in electric hybrid with Super All-Wheel-Control capability and SUV-sized cargo space. So you can do everything you would with a gasoline car and eliminate your need for a second car.