51. Mobile and desktop rankings are contextually personalized

[sumaiyakhatun27]

For some search queries, individual users' needs differ depending on whether they are searching from mobile or desktop, and this can affect rankings.

…It's normal for rankings to differ between desktop and mobile. Sometimes it's because of speed, for example. And sometimes it's because of mobile usability.
Sometimes it's also because of the different elements that are displayed on the search results page. For example, if you're searching on your phone, maybe you want more local information because you're on the go. Or, for example, if you're searching on your computer, maybe you want more images or videos in your search results. So we tend to show... a different mix of different types taiwan rcs data of search results.
And because of that, it can happen that the ranking or visibility of individual pages will be different on mobile and desktop. And that's normal, in principle. It's part of the ranking process. I wouldn't say it's because of the technical aspect of indexing content.

52. Syndication can affect rankings
Republishing and/or syndicating content on other sites can reduce your site's chances of ranking for your target keywords.

Mueller thinks syndication/republishing is a bad idea :

If you are republishing, it is duplicate content. If your goal is to reach a wider audience, do it. If your goal is just to rank for these queries, then syndication/republishing is a bad idea. Choose your goals and identify methods that will help you achieve them.