I will install google tag manager, analytics, facebook pixel

About:

Installation of Google Analytics tracking script on your website

Why should u add those?

This will help you to understand the value of your site and determine where you might be losing users throughout the conversion funnel.

This standard package includes installation and setup of 

Google Analytics 
Tag Manager
Search Console (Webmaster Tools)

Premium package (see below) includes Standard Packages plus:

Facebook Pixel
Adwords Tracking
Segmentation
Configuring up to 5 Analytics Goals with Funnel Steps   

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