When writing an article, it is important to have a clear beginning, middle and end. This is especially true for blog posts.
A blog should have an introduction and conclusion in order to give the reader a complete understanding of what the post is about.
An introduction should introduce the topic of the post, and provide information about why this topic is important. It should also provide a snapshot of the audience for the post, and what readers can expect.
The conclusion should summarize the main points of the post, and offer advice for those interested in further reading or pursuing the topic.
A blog post does not need an introduction if it is a short article or one-off piece. However, if a blog post is longer and includes multiple sections, it is best to include an introduction in order to provide a clear structure for readers.
Including an introduction also makes it easier for search engines to index your content.