Cll t ctn (CT) s mrktng trm fr ny txt dsgnd t prmpt n mmdt rspns r ncrg n mmdt sl. CT mst ftn rfrs t th s f wrds r phrss tht cn b ncrprtd nt sls scrpts, dvrtsng mssgs, r wb pgs, whch cmpl n dnc t ct n spcfc wy.