using plugin

I thought while reading the documentation that this plugin would also work if I added the hashtags and tag words per post manually, for instance,

blah blah blah post
#blah

but it is not working that way…am I doing something wrong or do I have to add a tag cloud to my blog, which I really don’t have time to do right now

https://ww.wp.xz.cn/plugins/publicize-with-hashtags/