How to add canonical URL in magento 2

In Magento 2 you can enable canonical URLs for products and categories. Setting canonical URLs is a way to direct search engines to a single canonical URL for indexing thus avoiding duplicate content.

Magento search for sites running on Magento 2

1. Log in to your Magento 2 admin panel.
2. click stores->settings-> configuration
3. Go to catalog in the left panel.
4. Click search engine optimizations
5. Set both Use Canonical Link Meta Tag for Categories and Use Canonical Link Meta Tag for Products to yes.
6. Click save the config.

Add Search to your Website