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Yes, it is. All you need to know for moving to https.

Each image should have an alt text. Not just for SEO purposes but also because blind and visually impaired people otherwise won’t know what the image is for.

They were wrong. Buy a domain for 10 years.

Enter the full http address for your sitemap here https://www.xml-sitemaps.com/validate-xml-sitemap.html

then press Validate

on next page you can press Notify

What about this:

This is from trulia.com website: