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Plugin Tag: required
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WP Required Taxonomies – Categories and Tags Mandatory | Default Selected
Before saving any post, taxonomies are required or by default selected when editing a post.
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DCO Post Validator
Allows you to make post, page, custom post elements required: title, content, featured image.
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Required Fields
Required Fields can help you write your Posts, Pages without forgetting fields, if you forget something you'll be alerted about that!
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Requirements Checklist
Allows admins to require content to be entered before a page/post can be published.
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WP Required Taxonomies – Categories and Tags Mandatory
Force users to select a taxonomy term when publishing posts. For example, make category or tags required
