Kindly refer to the following link(s):

Best form of 'Durood' or 'Salat Al Ibraheem'

Offering salutation upon the prophet ( salla Allahu alaihi wa sallam )

Should we send salutations upon our Prophet when we hear the athan & Iqama?

Must we send salutations on Prophet ﷺ when we hear his name during Salah, Adhan Iqamah

Is it mandatory / sunnah to send blessings (durood) every time we hear or read the Prophet's ﷺ name?

Ideal way of sending salutations (durood) upon Prophet

The ideal way to send blessings upon the Prophet (blessings and peace of Allah be upon him (IslamQA)

Can we repeat after a recorded athaan?

Is it ok to send short salutation on Prophet ﷺ on Friday or must we say Salatul Ibrahi? 

Speaking, Sushing others, replying to salam, sending salutations on Prophet ﷺ‎ during Friday khutbah

If we hear the Prophet's ﷺ name during Khutbah can we send Salawat or Durood?

Upon whom can we say Alayhis salam, Rahim Allah & Radi Allahu anhu?