Which Mode usually should be use for Magento 2 online store?
Default Mode or Production Mode ?
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For the live store, one should always use Production mode.
Reasons: Intended for deployment on a production system, this mode:
This improves performance because static files don’t go through the fallback mechanism; instead, URLs for static files are created as needed.
If your website is live then you should run it on "Production mode".
Live Store should be in
TO enable Production Mode :
bin/magento deploy:mode:set production
bin/magento s:d:c // For compilation
bin/magento s:up // Upgrade Data
bin/magento s:s:d // If your M2 version is 2.2.x than add -f , Will generate static files
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