LinkedIn is the platform where hashtag habits transfer worst. The conventions that read as normal on Instagram read as automated here, and the audience is unusually sensitive to it.
Three to five, all professional
The technical ceiling is around ten. The useful number is three to five. Every one should be vocabulary a person would use in a meeting: #productmanagement, #b2bmarketing, #supplychain, #clinicalresearch. No slang, no emoji tags, no #hustle.
Follow the tag before you use it
LinkedIn tags are followable, which makes them behave like small subscription feeds. Before committing to a tag, follow it and read it for a week. You will learn whether the people posting there are your peers, your customers or nobody at all — information no volume metric provides.
Some professional tags with impressive follower counts are almost entirely recruiters and lead-generation spam. Others with a tenth of the following contain exactly the practitioners you want. The only way to tell is to look.
Match the tag to the post type
LinkedIn content splits into a few recognisable modes, and each attracts a different audience through tags. A hiring post should carry role and location tags. A technical explainer should carry the discipline and the specific technology. A company announcement should carry the industry and the market segment, not generic business tags.
Where tags go
At the end of the post, on their own line. LinkedIn allows inline tagging mid-sentence and it consistently makes posts harder to read. Keep the body clean prose and put the tags underneath.
What actually drives reach here
Comments, and specifically comments in the first hour. LinkedIn weights conversation heavily, and a post that generates replies outperforms a perfectly tagged post that generates none. Tags help the right people find the post; a genuine question at the end of it is what makes them respond.
Personal versus company pages
Personal profiles reach substantially further than company pages on this platform. If you have the option, publish from a person and have the company page amplify, using the same tag set on both.