There are 2 types of CBD products on the market—those made from CBD isolate, and those made from Full Spectrum Hemp Extract.
CBD oil contains only 1 compound found in the hemp plant (cannabidiol), whereas Hemp Extract is "full spectrum," meaning it contains the full spectrum of cannabinoids found in hemp, such as CBD, CBC, CBG, and CBN.
When a variety of cannabinoids are present at the same time, they actually boost the effectiveness of each other. Meaning, a product that simply contains one cannabinoid, like CBD, would be far less beneficial than a product containing a variety of cannabinoids. This synergistic relationship between cannabinoids and a few other cannabis compounds (like terpenes and flavonoids) is known as the “entourage effect."
You can read more about full spectrum Hemp Extract in this Learning Center Article, "CBD OIL VS CANNABINOID-RICH “FULL SPECTRUM” HEMP EXTRACT"