There is no set definition for what a thumbnail is in a blog post, but typically it is a small image that is used to help draw attention to the main image or content on the page. Thumbnail images can be used in a variety of ways, such as to give readers an overview of the content on a page, to help emphasize key points, or to help drivers find pages they are interested in.
In order for a thumbnail to be effective, it must be relevant and interesting. Images that are too generic or irrelevant will not be as attractive or useful as those that are more specific and tailored to the content on the page.
Additionally, thumbnails should be kept simple and easy to understand. Too many details or elements can make thumbnails difficult to view and navigate, so it is important to strike a balance between providing enough information while still keeping them concise.
Ultimately, thumbnails are an important tool in creating engaging blog posts. By using them wisely and keeping them simple, writers can create images that help readers quickly understand the content on their page and make decisions about how to spend their time.