Why were only some products updated?

The task finished as Partially complete or updated fewer products than expected.

The plan limit was reached

Each plan allows a maximum number of products per task (for example 100 on Free). When a task matches more, the first products are updated and the task ends as Partially complete with the message This task matched N products, but only the first M were processed under your current plan. Upgrade on the Pricing page and choose Continue change on the task to process the rest. See Plans and pricing.

Products changed while the task ran

If products were deleted or edited in Shopify between the export and the write, the task cannot update them and lists them in the error banner. Click Export list for the full list. See Task errors and warnings.

Variant rules or exclusions

Products that are excluded, or whose variants do not match your Apply to variants conditions, are shown greyed out in Product changes and are counted as not changed. That is expected.

Automated collections

Collection membership in the task is read when the task starts. Products added to an automated collection after that moment are not included. Create a new task, or duplicate the finished one, to catch them.

The edit produced no change

Rows whose new value equals the old value, or whose text edit would have produced an empty result, are left unchanged.