Task
This case prepares the SEO title column from seo_title_source for the final CSV.
Short answer
Keep the existing SEO title when it is filled; use Title as a fallback for empty SEO title cells.
How to do it in Eofferix
Select the source column or create the output column from the specified source.
seo_title_source→SEO title.Open the settings of the output column
SEO title.
Real animation: opening the output column settings in the table editor. In Transformations, add the rules shown below.

Real screenshot of the Transformations block for this column. Save the settings, go to export, and check the values in the downloaded CSV.
Check target column names and accepted values against the official CSV documentation. Shopify CSV.
Before / after
Before
source data| Handle | Title | seo_title_source |
|---|---|---|
| lamp | Desk lamp black | Black desk lamp for home office |
| poster | Wall poster | |
| mug | Coffee mug | Ceramic mug 350 ml |
After
result| Handle | Title | SEO title |
|---|---|---|
| lamp | Desk lamp black | Black desk lamp for home office |
| poster | Wall poster | Wall poster |
| mug | Coffee mug | Ceramic mug 350 ml |