The products are placed by an algorithm. The number of orders and clicks within the last 14 days as well as the available stock of all (size) variants play a decisive role. This data is put in relation to the performance of the corresponding category.
You can positively influence the ranking by stating an inventory of > 0 for all existing variants and by using appealing, high-quality images and a clear title to encourage customers to click. See also: What do good product images have to look like?
In addition, you can increase your visibility through targeted marketing placements. Read more here: How can I book marketing on Avocadostore?