Mae'n cael ei lansio wrth i'r DU baratoi i adael yr Undeb Ewropeaidd a negodi perthynas newydd â'r UE a chytundebau masnach â phartneriaid rhyngwladol o amgylch y byd.
It is being launched as the UK prepares to leave the EU and negotiate a new relationship with the European Union and trade deals with international partners around the world.