A resource can be restricted from indexing in several ways:
– in the robots.txt file
– by Noindex X-Robots tag
– by Noindex Meta tag.
Each of these is a line of HTML code that says how crawlers should handle specific resources on the site. Specifically, the tag tells crawlers if they are not allowed to index the page or resource, follow its links, and/or archive its contents. So make sure that your unique and useful content is available for indexing.
For any other CMS like Jumbla, Shopify, Magento, etc you can ask your web developer to check the robots.txt file in the root folder where your websites are hosted and remove robots indexing restrictions. If you still need more info, you can contact the RankChutney team.