Although weblogs can be as different as any web pages they usually share some features. These are some of the common features of WordPress when used as a blogging platform.
Posts, Entries or Articles
The main part of the blog type of site; Blogs consist of a series of articles, often called posts, usually displayed in reverse chronological order, the most recent at the top. This is usually the main content of the blog. The entries may be organised into categories with the facility of opening only entries in a particular category.
Pages
Pages, like the one you are reading now, stand outside the chronological flow of posts. They do not have categories and tags. Pages are used to provide extra information, for example about this blog, on a standard blog. Pages may be used extensively on sites that are not focused on the latest updates, School Websites, or Resource blogs for example. These sites may consist wholly of Pages with no post, or they may have an updates or news page.
Comments
Reading blogs can be more like a conversation than a lecture. You can decide if you want comments on your posts or pages or not. If you allow comments these can be moderated. You have control of the content of your site.
Recent Posts, Recent comments
Blogs often have lists of recent posts and comments on a sidebar, linked to individual copies of the entry with the comments.
Archives, Tag-Clouds
Blogs usually offer various ways to view the entries. Archives usually consist of entries organised into monthly or weekly pages. Tag-clouds are lists of tag (or key) words displayed so that more frequently used words are bigger, clicking on a word in a tag cloud will lead to a list of posts containing that word.
Links, blogrolls, friends
Sites can offer links to similar blogs, sites or just friends.
RSS Feeds
When reading weblogs you will see a lot of graphics like these: 
These link to RSS feeds.
RSS (Really Simple Syndication) is a tool that helps you stay updated on your favorite websites without having to visit them all the time. Think of it like a news feed for the internet. When a website, blog, or news site adds new content, the RSS feed sends that update straight to you.
Instead of checking multiple sites for updates, you subscribe to their RSS feeds using an RSS reader (an app or website). This reader collects and displays new posts from all your subscriptions in one place, like an inbox for website updates.
So, RSS saves you time by gathering all the latest content from different sites in a single, convenient spot.
One weblog can display the RSS feed from another and more.
