How to use hashtags?

[phamdung]

Do be specific when using hashtags
Try and hone in on a passionate community that shares an interest in one specific theme. The more specific you can get with your hashtag, the more targeted your audience will be—and a targeted audience generally means better engagement. If you don’t have your own business hashtag, find one or two existing ones that really fit the photo.
Say, for example, your business sells baby products. Instead of using #parents—resulting in parents of children of all ages—opt for #newmom. The hashtag #newmom is specific to mothers of newborns—your target customer.