How can I prevent Google from indexing specific tag-filtered pages on my website?

Shopify Discussion
4

Hi, I have tried with the next code in theme.liquid but is not working;

{% if template contains “collection” and collection.handle == “?filter” %}

{% endif %}

{% if handle contains ‘?filter=’ %}

{% endif %}

Any help?

I also blocked it in robots.txt with;

{{ ‘Disallow: /collections/*?filter’ }}