Kuuak

After setting up WooCommerce and defining product attributes, you can define the default attributes, as well as there order, to be automatically added to new product.
It will make the creation of new product more efficient and fast as you won’t need 
to add manually the attributes, and remembering the same order for each new product.
Tested with WooCommerce version 3.3.3
<h3>Contribute</h3>
Don’t hesitate to fork this plugin and submit pull requests in the <a href="https://github.com/Kuuak/woo-default-attributes" rel="nofollow ugc">github repo</a>.

Woo Default Attributes

Define default attributes to be automatically added in WooCommerce new product page.

liveseopro

Custom Image Attributes is a lightweight WordPress plugin which allows you to add custom attributes to images on your website. You can add attributes to single images or all images.
You can use this plugin to add attributes to images as required by some other plugins, such as for lightbox, analytics and seo purposes. Add any attribute you like. Examples include;
data-lightbox=image-ad1 
title=demo 
alt=demo 
fetchpriority=high 
click-id=promo1 
or id, style, class, data, toggle & more
Free Features 
Add attributes to all images on your WordPress website. 
Add attributes to single images 
Remove attributes 
Disable native lazy loading for an individual image
Get Support 
Get limited support for this free plugin via the support tab.

Custom Image Attributes

Add custom image attributes to any image. Great for adding attributes to images for lightboxes, SEO, analytics & more.

Woo Default Attributes vs Custom Image Attributes