Trending @Accenture; Need guidence...

Hi, I was recently joined a team in my project which is salesforce based project...now the team has most seniors and they are working on some asset testing in salesforce...i am a Fresher QE..they are talking about some CPQ, Leads, Opportunities,Quotes ...and also Tenents..scope..location like i noted all those new terms they are talking about..i don't have any idea what are those...can anyone tell what should i learn in trailhead...any trailmixes ....please suggest..