Question: I am struggling to develop a general design that could better handle how to present 4k filters to users on a website, but not looking for e-commerce designs as the filters will also contain many filtering levels within.

The idea so far is to display all the filters in a left-side panel and the results would display to the right of it. But the left side pannel might end up being super long -- which is likely too overwhelming for users.

Any ideas?

Answer: 
There isn't an industry-wide agreed convention for what it is called, but I would call it a **Contextual search**.

On the [Carbon design system documentation](https://carbondesignsystem.com/components/search/usage/#formatting) by IBM, it's just called a Search.
[![enter image description here](https://i.stack.imgur.com/1PqYb.png)](https://i.stack.imgur.com/1PqYb.png)

I wouldn't call it a filter search, as this screenshot below from [Ant design system](https://ant.design/components/table#components-table-demo-filter-search) explains what a filter search is *(at least to them)*, and this behavior isn't what you described.
[![enter image description here](https://i.stack.imgur.com/svgKw.png)](https://i.stack.imgur.com/svgKw.png)
It's just a search.

When you use Google you are filtering a huge list of data relating to websites so that it only shows the results that are relevant to you.

The main difference between a 'modern' search and a filter is that a search tends to be a little more intelligent: you searched for "car" so it will return results for "automobile" too. whereas a filter will simply carve off anything that doesn't match the exact term.

Not all search routines are capable of this distinction so it's best to check with your engineers about the capabilities for 'fuzzy' searches before you commit to a UI choice involving a search.