Hashtag
A hashtag is a word or phrase prefixed with a hash symbol that labels or groups online content by topic and facilitates its discovery.
Graph Algorithms for Data Science
A hashtag is a word or phrase prefixed with a hash symbol that labels social media content for categorization and discovery.
- How it is used
- Uses hashtags to categorize tweet content and support discovery, then analyzes them for a social-media targeting strategy.
- How deep it goes
- Defines hashtag extraction and graph modeling, then builds a co-occurrence projection for community and importance analysis.
- Examples
- Uses tweets containing #KnowledgeGraph, #NamedEntityLinking, #Wikipedia, #NLP, #DataScience, and #Graphs, plus a Cypher co-occurrence query.
- What you can do after
- Apply via Cypher to construct hashtag co-occurrence networks and evaluate tags for a Twitter content strategy.
Read how Graph Algorithms for Data Science explains hashtag →
Writing for Developers: Blogs that get read
A keyword or phrase prefixed by a marker that categorizes social media content and makes it discoverable through topic searches.
- How it is used
- Uses hashtags to make blog posts, talks, and conference promotions visible to people tracking technologies, trends, or events.
- How deep it goes
- Explains audience targeting, handle contrast, search checks, bot and newsletter discovery, and conference use without discussing platform mechanics.
- Examples
- Uses #Postgres, #ziglang, #CoolCONF, @FakeDB, and @ziglang in blog and conference announcements.
- What you can do after
- Evaluate hashtags by searching their frequency and ambiguity before adding them to promotional social posts.
Read how Writing for Developers: Blogs that get read explains hashtag →
Related concepts
- tweetpart of · A tweet is a short post published on the Twitter or X social-media platform, optionally containing media.
- postconfigures · A social media post is an individual piece of user-published content on an online social platform, optionally containing text, media, or discussion.
- labelconfigures · A label is a value or annotation associated with an item that identifies its target category, outcome, or reference answer for learning or evaluation.
These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.

