■2020年9月よりAppleがSSL証明書の有効期間を13か月に短縮！詳細や対策とは？ | さくらのSSL
https://ssl.sakura.ad.jp/column/safari-shortening/
■List your products on Google Shopping for free – The Keyword
https://www.blog.google/products/shopping/its-now-free-to-sell-on-google/
It sounds like it's too late in your case, but in general, I would strongly discourage restructuring your URLs (eg, "_" to "-", or ".php" to ".htm") unless you have a really important reason to do so. The SEO value is essentially zero, and often the fluctuations are painful.
— 🍌 John 🍌 (@JohnMu) April 5, 2020
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