Why is Hanuman offered betel leaf garland in temples?

Garland of Betel Leaves and Hanuman:

After the success in the war against Ravana, Sita Devi spotted Hanuman in a betel leaf garden when Hanuman bowed to her feet seeking her blessings. Sita Devi plucked few betel leaves and showered on Hanuman in order to bless him, so the tradition is still followed.

Another story goes that when Sri Hanuman conveyed the message from Sri Rama at Ashoka Vatika, Sri Lanka. Sita Devi garlanded Sri Hanuman with a betel vine as a token of Her joy and appreciation, as she could not find any flowers nearby. Betel leaves should be made into a garland with a piece of areca nut in each leaf.

Betel leaves are associated with Marriage. It is believed that prospects of marriage like functions, materialize by betel leaves garland.

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