How can insert schema markup to your site using (GTM) Google Tag Manager

The most emphasis of schema.org has significantly improve in the SEO platform since its introduction in 2011. Schema.org is a collection of schemas for structured data markup (sometimes called “schema markup”) that most usefull for search engines better understand content on websites. Implementing this markup on a site can also improve how that site’s listings appear in SERPs.

One way to implement schema markup is by directly tagging the HTML code on your web pages. However, this requires two things:

Some basic coding knowledge CMS (Content Management System) access and/or FTP (File Transfer Protocol) access. The challenge is that often, SEOs don’t have the required coding skills, and many companies have strict policies on who can access their site’s website files.

About Google Tag Manager

Google Tag Manager is a free tool that allows marketers to add or update tags without having to know any website coding (or bother someone who does). In this case, we’re using it to add a snippet of code to the site — our structured data markup — without actually editing any of the website code.

Eight simple steps to add schema markup to your website using Google Tag Manager. 

Step 1: Create JSON-LD markup

Step 2: Create new Custom HTML Tag

Step 3: Paste JSON-LD markup into the Custom HTML text box

Step 4: Save your Custom HTML tag

Step 5: Create new trigger for Page Views

Step 6: Configure ‘Page View’ trigger

Step 7: Connect ‘Page View’ trigger to your schema markup tag

Step 8: Publish your Google Tag Manager container

For More Details: https://goo.gl/p5mfsZ