By adding Locations, your account will target the newest posts and users who post content with that specific location on Instagram.
For example: By adding the Golden Gate Bridge location, your account will interact with Instagram users who post content with the Golden Gate Bridge location:
We do not recommend adding broad locations (such as countries or cities) as you will most likely attract traffic that is not relevant to your niche.
We recommend adding specific locations (such as: gyms, restaurants, hotels, stores, etc.) where your target audience is likely to post from, in order to reach your target audience.