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I'm not sure what you are even asking.
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Users have their own opinion about what they expect from web-site. <br />
Users have their own opinion about which features are more important than others.<br />
Users may vote for features.<br />
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Purpose : provide the tool which is able to enable &nbsp;users such possibilities?
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Users have their own opinion about what they expect from web-site.
Users have their own opinion about which features are more important than others.
Users may vote for features.

Purpose : provide the tool which is able to enable  users such possibilities?

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Users have contact form or instant chat.
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On wordpress.
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What is the best tool/library for developer to get user stories of web-site for end users?

A web-based content management system (CMS) provides website authoring, collaboration, and administration tools that enables users with little knowledge or experience to create and manage website content. Most CMS systems use a content repository or a database to store page content, metadata, and other information assets, and a presentation component that displays the content to website visitors.