The importance of the mueththin.

 The importance of the mueththin.

Alhamdulillah, the Mueththin means the caller of the prayer 

As reported in hadith,

Narrated Abu Huraira:

Allah's Messenger (ﷺ) said, "If the people knew what is the reward of making the call (for the prayer and (of being in) the first row (in the prayer), and if they found no other way to get this privilege except by casting lots, they would certainly cast lots for it. If they knew the reward of the noon prayer, they would race for it, and if they knew the reward of the morning (i.e. Fajr) and `Isha prayers, they would present themselves for the prayer even if they had to crawl to reach there.

Sahih al-Bukhari 2689.

As reported in hadith,

It was narrated that 'Uqbah bin 'Amir said;

"I heard the Messenger of Allah (ﷺ) say: 'Your Lord is pleased with a shepherd high in the mountains who calls the Adhan for the prayer and prays. Allah says: 'Look at this slave of Mine; he calls the Adhan and Iqamah for the prayer and fears Me I have forgiven My slave and admitted him to Paradise.'"

Vol. 1, Book 7, Hadith 667.