The wordpress plugin we use here is External Media without Import, a completely free and open source plugin, which can be directly searched and installed in the wordpress website building background, or downloaded and installed through the address I provided.
External Media without Import plugin download
https://downloads.wordpress.org/plugin/external-media-without-import.1.1.2.zip
After installing the External Media without Import plug-in, there will be an additional Add External Media without Import button when entering the media library, through which you can add external link images.
If it is only a website operating in this way, the advantages of using backlink images are not obvious, because there are other methods that can be done, which may be more effective, such as using OSS object storage, etc., so that the website acceleration effect is more obvious. Yueran Network Studio feels that the biggest advantage of using the External Media without Import plug-in with external link images is that you can share a set of images across multiple websites, which can save a lot of server resources.
However, if you want to consider website SEO optimization, such an approach is very undesirable, so you should use it as needed.