What: As simple as it seems.
How: It can be long or short; it depends on what you think will help a user understand and want to view your post.
What: The cover image that shows up on feeds and other pages and gets people interested in viewing your post.
How: Usually the first image of your post... however interfaces like peakd.com have an advanced feature to allow you to change to any image in your post.
Here's how a thumbnail appears to others on peakd.com (or see the thumbnail used on this post).
What: Recap your post in a few words to help users know what to expect of your post.
Why: It is extremely useful if the post ever gets shared on other social medias or forums.
If you don't use a preview description then sites will simply use the first line of your post to describe your post and that is not helpful in most cases.
Where: You will find the short preview description toward the bottom of your draft area and looks like the picture presented here:
Only available on some interfaces like peakd.com
For the reader, the short preview description will appear below the thumbnail as they scroll their feed. The reader will not see the preview once they click on the actual post. You can see the example below. The short preview description is visible below the thumbnail and above the interaction area (likes, comments, re-blogs, etc.).
Example of Short Preview Description:
What: Hive blogging uses a system of formatting known as "Mark down".
How: Interfaces to Hive blogging like peakd.com will give the user an editor with buttons that will help users do the correct formatting with limited knowledge of "mark down". For example, two ** on each side of a word will make it bold, but you could highlight a word and simply hit the Bold button on PeakD.com.
Why: Formatting is good to help break up long sections of text or to make important parts of your post stand out.
For additional tips on formatting, click here to read a tutorial about formatting by 
Some people call them topics while some people call them tags. Very few on Hive call them Keywords. I personally prefer TOPICS. (I do understand that software developers will be inclined to say tags because that's how it's coded.)
What: Topics are used to help clarify what your post is about.
Why: Your post will be found on topic pages with others that have also used the same topic-tag.
How Many: Presently the first 10 topic-tags are indexed and used for Topic Pages.
Where: You write in your topic tags below the short preview description on the draft page.
Example:
What: These are tags that let different projects know to include your post.
Example: #photofeed let's the 
What: The first topic-tag is considered a category and can never be changed.
Why: First topic-tag helps other users to quickly look at your post and understand what your post is going to be about (along with your thumbnail and title).
Suggestion: Try to make this topic-tag relate to the most important aspect of your post. Don't use overly generic tags for this first one.
What: Some communities have upgraded their experience to indicate some topics their community likes to see. They will be located in the "Recently used" section of your draft or suggested in the community rules.
Why: It helps for quick access and to give ideas to new users what types of posts may be popular.
Suggestion: These topics are just suggestions and not limitations.
What: It's a topic that many users have used for a specific type of post.
Example: #introduceyourself is an open-ended post used to introduce yourself. Many Hive users come to find new people there.
What: It's best to consider communities as a location on Hive that people come together to share posts of a similar interest. However, beyond topics this location has rules and moderators and often a committed interactive group of users.
How: When you write a post on interfaces like peakd.com you get the option of a community.
Tip: Communities are represented by "C/" on peakd.com which is how they're indicated in the URL as well.
Tip: Even if you post to a community and not your blog your followers will still see your posts in their follower feed. Whether you add the post to your profile's blog page does not impact that.
If you want to browse the communities, click on the pull-down menu "Communities" and you will see a button to press showing all the communities.
BLOG: Best to think of your Profile Blog as a place.
Your blog is a page on your Profile that you curate with posts. You may put your own posts there (very common) and you may put other people's posts there.
HOW: You can "reblog" any hive post which is a sort of "add to blog" function.
Your blog can be a place where you add and remove posts at will (unless you publish a post directly to blog). It's the first page users see when visiting your profile page. You may click on the button as seen below to reblog your post before you publish it.
You can also click on the reblog icon in the interaction section as seen here:
COMMUNITY: Best to think of each community as a separate place that people put their posts.
You may post to a community and immediately also post to your own profile's blog.
POSTING STRAIGHT TO BLOG: I highly discourage this and wrote about it on this post. In short if you post straight to blog you can not remove from your profile's blog page, because then the post doesn't have a home. Also you don't have any moderation abilities.
Post in a community that has a group of users you want to interact with and rules that you appreciate and you like their moderation practices. For example, are their moderators inclined to remove (or not) spam or dangerous links from your posts? Below you see a picture that will show you all the communities you are subscribed to so that you can easily click on the community from there to post in that community.
You will need to subscribe to a community in order for it to show up in this list.
You may also go the the community itself and click "write a post" in that area.
DRAFTS: Most interfaces allow you to write and save your uncompleted post as a draft. For all interfaces that do this, it's usually auto-saved every few seconds.
SCHEDULED POSTS: Some interfaces like PeakD.com allow you to schedule a post at a specific time and date. However, this requires giving them the authority to post for your aka "posting authority" at that point they take that draft and automate a posting at the time you indicated.
These are advanced options and you don't have to do any of these so I won't explain them in depth and if you want to do them then you're probably inclined to figure them out.
To find the Advanced options, click on the word "advanced" as seen here:
You should see something similar to this example here:
Notice you can pick your cover image (thumbnail) here if you want to use a picture that is further down in your post.
This post is meant to help you in the creation of your posts; however, if you would like to learn more about Hive, you might consider reading this post for a guide on Hive by 
Thank you for reading and happy posting.
