Hello,

about SEO: I totally agree with you, SEO is fundamental for every Spreadshop.
I would like to remember you that this summer my Spreadshop has missed TITLE and DESCRIPTION tags for a long time and this caused a loss of 80% of search engines traffic (see here https://forum.spreadshirt.net/threads/17738-Product-Title-Description).

Then you have fixed the problem but not completely.
Right now it's impossible to choose a proper DESCRIPTION tag in MY PRODUCTS -> DETAILS page. In your SEO tutorial you say to add good meta elements (title, keywords and description) to every webpage but right now I can only choose meta TITLE (even if your platform changes it automatically) and no meta DESCRIPTION or KEYWORDS.
I know that KEYWORDS are useless nowadays but DESCRIPTION is still very important for search engines and to increase click-trough rate on SERPs.

Please, consider to let partners add meta DESCRIPTION to every product page and DON'T change meta TITLE.

Thanks!