Hashtags are one of the biggest crazes on Twitter and on Instagram. If a celebrity uses a particular hashtag it is sure to blow up in an instant. Or as a business owner, you can use hashtags to indicate a sale or other new product release. If a customer uses the hashtag, you can give them a discount on a future purchase or other such incentive for using it.
Using the current trends and incorporating the trends to your account and photos you share is likely going to gain more attention. Not only are more visitors going to look at images which have a catchy headline and hashtags, they are also more likely to share these with friends and possibly others who do not follow your Instagram account.
In turn, this means new followers, it means more likes on the images you share and it potentially means an increase in sales figures for a particular product which has a catchy hashtag. All this comes by simply posting a photo on the social media site and properly utilizing the trends which are currently well known by the visitors and followers who follow you on the social media platform.