You can also use hashtags on Pinterest. When this post was first published in 2017, you could use them but they were not yet clickable. Since 2019, they have been clickable and of course can also be used via search. However - and this has changed in 2021 - this only works in the mobile Pinterest app. Hashtags can no longer be clicked on the desktop.
There also seems to be a love/hate costa rica telegram screening relationship with hashtags on LinkedIn. They were introduced in 2013, abolished again for a while, and then reintroduced in 2016. You can find a current article about hashtags on LinkedIn here. By the way, notLinkedin using more than 3 hashtags per post. So less is more here too.
hashtags on tumblr
Tumblr is a mixture of your own website, a blog and a kind of Twitter and is very easy to set up. Reposting other people's posts is very straightforward. Apparently I'm not the only one who hasn't really warmed to Tumblr. In any case, as far as I know, its importance for business use is rather low. But since you can also use hashtags on Tumblr, I thought it should be included in the overview. For example, you can find a short article on using hashtags on Tumblr in the Chip practical tips .