Bookly is a booking plugin for WordPress for building an advanced automated online scheduling system.

Noted That:

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

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "WordPress Online Booking and Scheduling Plugin – Bookly" folder is added on left sidemenu. Now, Click on "WordPress Online Booking and Scheduling Plugin – Bookly" folder.

Noted that: If you do not see "WordPress Online Booking and Scheduling Plugin – Bookly" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

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

Guide
MINIMUM REQUIREMENTS WordPress 3.7 or greater PHP version 5.3.7 or greater MySQL version 5.0 or greater AUTOMATIC INSTALLATION Automatic installation is the easiest option as WordPress handles the file transfers itself and you don’t even need to leave your web browser. To do an automatic install of Bookly, log in to your WordPress admin panel, navigate to the Plugins menu and click Add New. In the search field type “Bookly” and click Search Plugins. Once you have found our plugin, you can install it simply by clicking Install Now. WordPress will automatically complete the installation. MANUAL INSTALLATION The manual installation method involves downloading our plugin and uploading it to your web server via your favorite FTP application. Download the plugin file to your computer and unzip it. Using an FTP program, or your hosting control panel, upload the unzipped plugin folder to your WordPress installations wp-content/plugins/ directory. Activate the plugin in the WordPress sidebar menu –> Plugins. GETTING STARTED When the title of the plugin has appeared on your dashboard, you may start the setup. The following steps are required to make it possible for customers to use your newly installed plugin: Create a staff member of your company; Define a category of services and list of services in each category (you can add up to five services with free version of Bookly); Determine the price and the duration of services; Associate services with a staff member; Set a working schedule for a staff member; Add booking form to a website page. Upon the completion of these steps, customers can book appointments. In the Calendar section of the administrator’s view, administrators can add the information about appointments manually. The website administrator can also look through and set: Appearance mode of booking forms; Staff member’s individual schedule; Staff member’s individual service prices; Set holidays and days off; List of customers with contact information; Email Notifications and SMS reminders.

Guide

MINIMUM REQUIREMENTS

WordPress 3.7 or greater
PHP version 5.3.7 or greater
MySQL version 5.0 or greater

AUTOMATIC INSTALLATION

Automatic installation is the easiest option as WordPress handles the file transfers itself and you don’t even need to leave your web browser. To do an automatic install of Bookly, log in to your WordPress admin panel, navigate to the Plugins menu and click Add New.

In the search field type “Bookly” and click Search Plugins. Once you have found our plugin, you can install it simply by clicking Install Now. WordPress will automatically complete the installation.

MANUAL INSTALLATION

The manual installation method involves downloading our plugin and uploading it to your web server via your favorite FTP application.

Download the plugin file to your computer and unzip it.
Using an FTP program, or your hosting control panel, upload the unzipped plugin folder to your WordPress installations wp-content/plugins/ directory.
Activate the plugin in the WordPress sidebar menu –> Plugins.

GETTING STARTED

When the title of the plugin has appeared on your dashboard, you may start the setup. The following steps are required to make it possible for customers to use your newly installed plugin:

Create a staff member of your company;
Define a category of services and list of services in each category (you can add up to five services with free version of Bookly);
Determine the price and the duration of services;
Associate services with a staff member;
Set a working schedule for a staff member;
Add booking form to a website page.

Upon the completion of these steps, customers can book appointments. In the Calendar section of the administrator’s view, administrators can add the information about appointments manually. The website administrator can also look through and set:

Appearance mode of booking forms;
Staff member’s individual schedule;
Staff member’s individual service prices;
Set holidays and days off;
List of customers with contact information;
Email Notifications and SMS reminders.

automated, online, scheduling, system, advanced, building, booking, plugin, wordpress, bookly,

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Reffered: https://wordpress.org/