Displays a smart monthly archive of posts in a more compact form rather than the default long archive widget.

Noted That:

To install correctly this compact-archives.zip.
Fisrt Download the compact-archives.zip to your computer
Extract/Open compact-archives.zip to Your Computer.
Then, Find readme.txt file inside compact-archives.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "compact-archives.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "compact-archives.zip" Downloaded plugin from your computer, Where you downloaded compact-archives.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Compact Archives" folder is added on left sidemenu. Now, Click on "Compact Archives" folder.

Noted that: If you do not see "Compact Archives" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Compact Archives Configurtions and Settings or How to work "Compact Archives" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "Compact Archives" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is Compact Archives
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide

Guide
Upload the plugin folder to your /wp-content/plugins/ folder. Go to the Plugins page and activate the plugin. Put at the place in your template where you want it to appear, e.g., in your sidebar: You can also use shortcode `[compact_archive]` in a page or post to display compact archives. See FAQ for shortcode parameters. There is also a Compact Archives Widget which can be used to display compact archives in sidebar or any widgetized area.

Upload the plugin folder to your /wp-content/plugins/ folder.
Go to the Plugins page and activate the plugin.
Put at the place in your template
where you want it to appear, e.g., in your sidebar:
```
 
```
You can also use shortcode [compact_archive] in a page or post to display compact archives. See FAQ for shortcode parameters.
There is also a Compact Archives Widget which can be used to display compact archives in sidebar or any widgetized area.

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Reffered: https://wordpress.org/