There were actually many different promos for this show :-
1- one was where that sancha(Mould) breaks saying that gungun is not a typical bahu material and does not tick many ideal daughter in law qualities.
2- When Gungun came to invite chavvi for birthday in pink dress and anu was putting flower arrangement at door and it falls on gg that promo shows the cultural difference between both the families.
3- When Anu asked gg that you haven't accepted maa and badi maa's friend request and she says kab bheji and he tells that humare yaha moon daal ke pakore and chai hi dosti ka invitation hoti hai . Kabhi ye chat room bhi join krke dekho and she says sabki family unke pase nahi hoti and mobile hi unhe jod ke rakhta hai . It shows that she had no experience of living in a joint family.
4- One in which anu and gungun were at restaurant and gungun says she said yes to marriage and ki humari family humari zindagi barbaad kr rahi hai ye shaadi krwa ke.
Third promo was the one which made me start watching it . Usko dekh ke mujhe laga anu and Gungun had a love marriage with family permission and it will show how both gg and family will try to adjust according to each other . And how Anu will be thread of those relation who ll make her understand things but will let her make decision what she wanna do.