https://adtechbook.clearcode.cc/ https://adtechbook.clearcode.cc/ Above link will will give basic 101/102 Also I googled "adtech for dummies" it returned good

https://adtechbook.clearcode.cc/ https://adtechbook.clearcode.cc/ Above link will will give basic 101/102 Also I googled "adtech for dummies" it returned good results