How to control your background with a 70 - 200 telephoto lens

Full post with link to model: Gear Used: Tamron 70 - 200 2.8 G2 : 70 200 g2&N=0&InitialSearch=yes&sts=ma&typedValue=&Top Nav-Search=&BI=6857&KBID=7410 Tamron 35mm 1.8 Lens: Nikon D850 46 megapixel DSLR: Profoto B1 Flash: Watch the Ultimate 70 - 200 shootout video here: Gear and Workflow Recommendations: Our Favorite Gear - Music - Epidemic So