Using IFrame to influence SEO

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Two days ago, the forum has a member mentioned the use of IFRAME to SEO impact.

Today, I met two friends on QQ to talk about this thing. So I copied the answer to that question.

I will not answer any more questions. In order to save time, SEO training blog does not do layout processing.

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Member:

IFrame problem

Let's discuss whether the search engine will view the IFRAME content as the current page.

That is, the content that the IFRAME refers to is the page's ranking factor.

Why, please give me an example.
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Spider:

IFRAME content will not be treated as page content

IFrame references have a negative impact on rankings, especially when referencing external content
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Member:

Why, theory is not necessarily consistent with reality. Have you seen a similar page index case? Would you please post it for a look if you have any?

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Spider:
..........................

Everyone's busy, but the answer you're giving is basically not misleading.

I've met before, but it's not possible to find out the previous site or page again, and a lot of stations are purely SEO experiments have been closed

Your question is not much worth discussing, so you can only give your opinion.

Why? You seek truth, I agree. But you can do it all by yourself, why not prove it yourself?

Spider simulators and a lot of online tools can prove your first problem. Suggest you make a small station, CN corn A dollar, or find a free space, Ifame put keywords, testing, observation.

The second problem is that IFRAME is an unfriendly element that allows the engine to see things that are different from what netizens see. You make a page experiment and you'll find out soon enough. The website is hung horse, it is easy to drop rank. This is what everyone should know? Because the horse is hung many times because the Trojan is using an IFRAME code to insert.