The question of ideal blog post length is ultimately a question about what your reader needs to understand the topic completely. A post explaining how to enable two-factor authentication on Gmail might need five hundred words. A post comparing eight email marketing platforms for small businesses might need three thousand. Padding the first post to hit an arbitrary target produces worse content. Cutting the second post to keep it brief leaves the reader without information they needed. Match length to depth of topic, always.
From a search engine optimization perspective, longer content tends to rank better for competitive keywords because it signals more comprehensive coverage of the topic. Research from multiple SEO studies has found that the average first-page Google result contains roughly fourteen hundred to seventeen hundred words. This is not a prescription: it is a reflection of the fact that comprehensive content tends to answer more of the questions readers actually have, which leads to more engagement, fewer bounces, and stronger ranking signals over time.
The more useful framework than word count is completeness. Before writing, list every question a reader might have about the topic. Then check that your post answers all of them. If you have answered every reasonable question a reader would bring to the topic and you are at nine hundred words, publish it at nine hundred words. If you are still missing significant sub-questions at two thousand words, keep writing. Completeness is the actual goal. Word count is a rough proxy for it.
Different content formats justify different lengths. A how-to guide that walks through a multi-step process needs to cover each step thoroughly, which typically produces longer content. An opinion piece or a trend analysis can make a compelling argument in fewer words if the argument is tight. A case study needs enough detail to be credible but should not pad its narrative with unnecessary context. Match format to length as thoughtfully as you match topic to length.
Readability matters more than length once you have written enough content to cover the topic. Long posts that are organized with clear headings, bullet points where appropriate, and short paragraphs read faster and retain readers better than dense walls of text at any length. Use headers to let readers scan and find the sections most relevant to them. Break complex ideas into digestible chunks. The reader's experience of the content is a function of both what it says and how easily they can navigate it.
Write as much as the topic requires, organize it so readers can find what they need quickly, and let the search performance data tell you over time whether the depth you are providing is matching what your audience needs.