Adobe Shockwave Player was a browser plugin that allowed users to view multimedia content created using Adobe Director. This content could include interactive games, presentations, and animations. Think of it as a more advanced, and ultimately less successful, competitor to Flash.

Essentially, it was a way to run applications and interactive content directly within a web browser.

However, unlike Flash, which was very widely adopted, Shockwave never achieved the same level of popularity.

Why it[SQ]s no longer relevant :

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Security vulnerabilities:

Like Flash, Shockwave became a target for security exploits. These vulnerabilities led to it being increasingly viewed as a security risk.
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Decline of browser plugin support:

Modern web browsers have largely moved away from supporting plugins like Shockwave and Flash due to security concerns and the rise of HTML5 and other web technologies. These newer technologies provide similar functionality without the need for plugins.
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Adobe discontinued support:

Adobe officially ended support for Shockwave Player years ago. This means no further updates, security patches, or technical support are available.

In short, while it once had a purpose, Adobe Shockwave Player is outdated, insecure, and no longer functional in modern browsers. Any website attempting to use it will likely either fail to load the content or issue security warnings.