Broad spectrum CBD extracts are similar to full spectrum CBD extracts in that they contains a natural spectrum of other cannabinoids besides CBD that are naturally found in hemp. The difference is that broad spectrum CBD extracts have had all of their Tetrahydrocannabinol (THC) removed. They are THC-free.
Typically it’s not possible to remove THC until the hemp extract has been refined by distillation so broad spectrum CBD extracts are typically free of other phytocompounds of hemp such as terpenes, flavonoids (cannaflavins), aldehydes, etc. Distillates are are not worse per se, they are useful in product formulation, it’s just a tradeoff that makes this type of extract different. A broad spectrum CBD extract can include common phytocannabinoids such as CBD, CBDV, CBG, CBC, CBN, THCV, etc. but not THC and not other phytocompounds unless they are added in later through product formulation.