You can deal with web crawler using a meta tag. This guide should be able to help you out: https://support.google.com/webmasters/answer/93710.
To add a meta tag to the head of your Shopify theme, you will need to go to Online Store > Themes > Actions > Edit code to access the theme.liquid file. Here, find the <head> tag and paste your meta tag within it.
Be very careful when editing theme code. If you are inexperienced, it is best to have a developer handle code changes.
Hope that helps