Whether you post daily, weekly, monthly or yearly, the post page provides an interactive way for you to communicate with your members. You can set a post to be “sticky” so it will always be featured at the top of the post list. You can also set a feature picture for each post. This will be the picture shown in the post list page, as well as an excerpt of the text.
Categories are used to organize your posts. For example, you could have a “blogs” category as well as a “press release” category. You can then create a menu link directly to a category, to let your website visitors access all the posts under a category. That way you have a menu link to just the blogs, and another menu link to press releases.
Your website visitors can also write comments to posts, allowing you to interact with them. From your WordPress administration you can enable or disable comments for all posts or for each post, as well as require comments to be approved before they become visible. WordPress plugins are available to automatically filter out spam from the comments as well.
If you setup your user description in your WordPress user profile, an author box will appear with your user image (which you have to upload to gravatar) and that description. If you have multiple users writing posts, this is a great way to differentiate the authors to your website visitors.
Important tip for SEO: if you have a Google Plus account, use your Google Plus account as your user website under your WordPress user profile. Then setup your Google Plus authorship so you are listed as an author for your website. What this does is enable your picture and authorship to show up in Google search results, which makes it much more likely for people to visit your website.