An Instagram Shoutout is a way to advertise another instagram account via a link that is generated using the @ sign attached to the instagram channel name that you want to promote.
EXAMPLE: Visit my friend’s instagram gallery clicking this link: @thechannelnameofmyfriend
Usually the shoutout is done by writing the promotional phrase in the caption of the photo that you publish.
WHY HAVING ONE
Having a shout out in a channel that has many instagram followers allows to promote your gallery quickly and directly.
If for example you are a fashion brand or a fashion blogger will be better having your shoutout on a channel that has many instagram followers interested in fashion or lifestyle.
Below are some examples of instagram shoutouts.