SEO for google

Good morning.
I understand that at Hikashop you are aware that Google is giving more and more importance to paid searches.
There are also (for some searches) some results that show products with their description and price.
My intention is to improve my positions in these product results.
To do this, I would like to know if in Hika it is advisable to put content in each of the characteristics of the same product.
And if it is recommended, I would like to do it in the description section or in the custom fields section, knowing that if it is put in the description field the general description of the product will be hidden when the user selects this option.
Anyway, I want to improve the product/feature SEO and I want to know which is the best option in Hika.

If it is a different description of the variants, is it better to do it in the description field or in the custom fields section?
Or is it indifferent to Google?

Thanks!!

Hi Nicolas.
Seeing your recommendations, I have a question.
It's probably something minor, but I'd like your opinion on it.
By default in Hikashop you must always indicate a default variant (or characteristic) to be shown in the first position.
Thus, when a page loads, the complete description, let's say, would correspond to the overall product.
If I want to put an alternative description to the variant that I set by default, this description will cause the global description of the product to not be seen.
There is the option of putting some additional information from the first variant in custom fields, but as you told me, that "is not read by Google" as structured data.
What can you do about it?
Or let's say that we have to "sacrifice" the first variant of each article?

Hi.
I have tried putting a "Select".
The problem is that it says unavailable and the option to add to your order continues to appear.