Did you know the word ghazal is an arabic word and it means romantic, poetic talks to a girlfriend. Ghazals are usually songs about unrequited love.
This is a poetic form mostly used for love poetry in Turkish, Urdu, Arabic, and Persian.
Ghazals were written by the Persian mystics and poets Rumi (13th century) and Hafiz (14th century), the Azer poet Fuzuli (16th century), as well as Mirza Ghalib (1797–1869) and Muhammad Iqbal (1877–1938), both of whom wrote ghazals in Persian and Urdu. Through the influence of Johann Wolfgang von Goethe (1749–1832), the ghazal became very popular in Germany during the 19th century; the form was used extensively by Friedrich Ruckert (1788–1866) and August von Platen (1796–1835). The Kashmiri-American poet Agha Shahid Ali was a proponent of the form, both in English and in other languages; he edited a volume of “real ghazals in English”.
It is common in ghazals for the poet’s name to be featured in the last verse (a convention known as Takhallus).
( As told by Mr. Javed Siddiqui)
The link below explicitly explains how to identify a ghazal.