The letter "پ" is a consonant in the Persian alphabet, representing the sound similar to the English "p." It is the 16th letter in the alphabet and is used in various words in the Persian language. "پ" is also found in other languages that use the Persian script, such as Urdu and Pashto. In terms of pronunciation, "پ" is pronounced as a voiceless bilabial plosive, which means it is produced by obstructing airflow in the vocal tract. This letter is essential for forming many common words in Persian, contributing to the richness of the language.