The way to use hashtags varies from platform to platform, as the algorithm is different on each social media.
On Facebook, we recommend using one or two hashtags, to add to the post or comments. Posts using between one or two hashtags are found to perform better than others. Indeed, this amount of hashtags generates, on average 593 interactions, compared to 307 interactions with 6 to 10 hashtags (Post Planner, 2020).
On Instagram, it is recommended that you use between 5 and 10 hashtags per post. Whether it’s in a story or a newsfeed post, it’s best to put a few more hashtags in order to get noticed. It is possible to “hide” the hashtags in the comments section to lighten the description under the post and make it look less spammy. Adding hashtags to your bio can spark discussion, since this is one of the first things your new follower will see when viewing your profile.
On LinkedIn, we use three to five hashtags respecting the following points: stay professional, avoid jokes, make sure there are no mistakes. The primary purpose of using hashtags on LinkedIn is to get noticed in the business world. By the way, the most popular hashtags are: #productivity and #leadership.