How long does it typically take for magento changes to be reflected on site? I've tried viewing my page on incognito mode and page source does not show the new title and meta description. Please help.
System > Cache Management -> Flush Magento Cache
After that check if it working fine :)
If you have Varnisch then you need to clean varnisch cache (if that case). We share nice module to fix that problem (no button to clean varnisch cache): https://bitbucket.org/smartmagepl/magento-2-varnishclear
After installing and configuring you get option in panel to clean Varnisch Cache as a additional button. :)