A hashtag is a label used in social media that makes it easier to find posts based off their theme or specific content. Using hashtags makes it easy to cut through extra clutter on social media and search the specific information or content you want to see.
An industry-related hashtag will help you reach your target audience. They can be generalized or very specific.
The best practice is to experiment with what hashtags will get your business visibility from your target audience. The more you use a specific hashtag the greater your chances to grow your audience. If a hashtag is not working for you, change it, but give each one a chance to work first.