Posterno is a powerful, extendable directory plugin that helps you create any kind of listings & classifieds directory like Yelp or Tripadvisor.

Noted That:

To install correctly this posterno.zip.
Fisrt Download the posterno.zip to your computer
Extract/Open posterno.zip to Your Computer.
Then, Find readme.txt file inside posterno.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 "posterno.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 "posterno.zip" Downloaded plugin from your computer, Where you downloaded posterno.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Posterno – Listings Directory & Classifieds" folder is added on left sidemenu. Now, Click on "Posterno – Listings Directory & Classifieds" folder.

Noted that: If you do not see "Posterno – Listings Directory & Classifieds" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Posterno – Listings Directory & Classifieds Configurtions and Settings or How to work "Posterno – Listings Directory & Classifieds" 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 "Posterno – Listings Directory & Classifieds" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is Posterno – Listings Directory & Classifieds
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide
Minimum Requirements PHP version 5.5 or greater (PHP 7.2 or greater is recommended) MySQL version 5.0 or greater (MySQL 5.6 or greater is recommended) Visit the Posterno server requirements documentation for a detailed list of server requirements. Automatic installation Visit the Posterno automatic installation documentation for detailed instructions. Manual installation The manual installation method involves downloading Posterno and uploading it to your webserver via your favourite FTP application. The WordPress codex contains instructions on how to do this here. Updating Automatic updates should work like a charm; as always though, ensure you backup your site just in case.

Guide

Minimum Requirements

PHP version 5.5 or greater (PHP 7.2 or greater is recommended)
MySQL version 5.0 or greater (MySQL 5.6 or greater is recommended)

Visit the Posterno server requirements documentation for a detailed list of server requirements.

Automatic installation

Visit the Posterno automatic installation documentation for detailed instructions.

Manual installation

The manual installation method involves downloading Posterno and uploading it to your webserver via your favourite FTP application. The WordPress codex contains instructions on how to do this here.

Updating

Automatic updates should work like a charm; as always though, ensure you backup your site just in case.

directory, classifieds, listings, like, kind, yelp, tripadvisor, create, powerful, extendable,

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Reffered: https://wordpress.org/