More placeholders

Labelline Pro adds four placeholders. Like Labelline's, each is filled in for every product, and a label whose placeholder has nothing to show for a product is left off that product.

Placeholder	Shows	Nothing to show when
{stock}	Units in stock: "Only {stock} left" → "Only 3 left". A variable product that tracks stock per variation shows them added up.	The product doesn't track stock, or none is left.
{sale_ends}	When the scheduled sale ends: "Ends today", "Ends tomorrow", "Ends in 3 days", counted in your site's calendar days. A variable product shows the first of its variations' end dates.	The product isn't on sale, or its sale has no end date.
{attribute:pa_colour}	An attribute's values, separated by commas: "Also in {attribute:pa_colour}" → "Also in Blue, Green". Use the attribute's slug after the colon: pa_ and the slug of a global attribute (Products → Attributes), or the name of a product's own attribute.	The product doesn't have the attribute.
{sales}	Units sold, as WooCommerce counts them: "{sales} sold" → "1,250 sold".	Nothing sold yet.

The insert buttons under the label's text add them for you; the {attribute:…} button inserts your first attribute's slug.

Combining them

• "Only {stock} left" with the condition Stock quantity from 1 to 5: a low-stock label that disappears when stock is replenished, or runs out.
• "{sale_ends}" with a clock icon and the Sale ending soon condition: a countdown for the last week of a sale.
• "{sales} sold" with the Best seller condition: social proof on your top products only.

{sale_ends} makes a label a sale label, like {discount}: WooCommerce's sale badge gives way to it (see Stockline, Discountline and the sale badge).