WMEric

This free WooCommerce extension permits you to hide categories on your shops main page. 
For this you have to save the categories with ‘,’ seperated in woocommerce > settings > products tab section.
In order for this to work you have to have Categories displayed. This can be set via Customizer. Appearance > Customize > WooCommerce > Product Catalog.
“Choose what to display on the main shop page.” Select Show categories as seen in the Screenshot below.
<h3>Additional Information</h3>
For users who has a different/custom page for their shop you can edit the wc-hide-categories.php file 
Find line # 127 and remove //
<pre><code>//$mwd_opt4 = in_array( 'product_cat', $taxonomies ) && ! is_admin() && is_page('YOUR_PAGE_SLUG'),
</code></pre>
Then find line #129 <code>/*|| $mwd_opt4*/</code>
Change to 
 || $mwd_opt4
To remove products from those categories find line 160
<pre><code>// Uncomment the function below if you also want those products hidden
/*
 add_action( 'woocommerce_product_query', 'mwd_hwcosp_remove_product_in_cat' );

 function mwd_hwcosp_remove_product_in_cat( $q ) {
 //hwcosp_global is the databse row entry
 $opt_terms = get_option('hwcosp_global');

 // Processes our users data to the way we want it from above
 $data = mwd_hwcosp_comma_separated_to_array($opt_terms);

 $tax_query = (array) $q->get('tax_query');
 $tax_query[] = array(
 'taxonomy' => 'product_cat',
 'field' => 'slug',
 'terms' => $data, // Set Category Slug which products not show on the shop and Archieve page.
 'operator' => 'NOT IN'
 );
 $q->set( 'tax_query', $tax_query );
 }
*/
</code></pre>
The code is well documented so its easy to find what part you are looking for
If you have any question please ask in the support forum, Thanks

Hide Categories On Shop Page

Not only doesn't this plugin work right.  It throws PHP warnings and fills the error log.  
At this point, this plugin hasn't been updated in over a year.

This doesn't work

Simple solution to hide specific categories in you woocommerce shop main page i.e. domain.com/shop This plugin was based on WC Hide Categories On Shop …

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<iframe loading="lazy" class="youtube-player" width="560" height="315" src="https://www.youtube.com/embed/LiXcE6aEvdI?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>

Hide Admin Menu

Working FIne

Using this plugin, we can hide the admin menu easily.

Hide Categories On Shop Page vs Hide Admin Menu