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We also know what Google is not looking for. They are not looking for websites that pander to an algorithm, nor a site that tries to fake its way into popularity through bogus links. The time is coming when outright abuse of the system will no longer be a valid option.
All this is very vague – so how about some specifics?
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- Link exchanges for SEO is a bad idea. There is a big difference between link exchanges for SEO and two sites that happen to exchange links. Using automatic link exchanges, having highly unrelated links, massive amounts of links regardless of the quality, etc should be avoided at all costs.
- Purchasing links is definitely a bad idea. Some argue that Google could nevër find out who is selling links. The fact is, though, that purchased links, at least at the most basic level, are extremely easy to detect.
- Thousands of links do not mean what they used to. Links must be related. If you want to see a significant effect, they should also come from highly trusted websites in a natural way. It is possible to be hurt by bad links.
- Obvious SE sp@m, such as hidden text, redirects, etc will eventually get you banned.
- Being a careful webmaster is important. Innocent and careless mistakes can and will cost you. Setting up a website with broken links, multiple URLs for the same page, poor navigation, etc will scream poor quality.
- Rehashing content does not work. Google wants one of two things: 1) completely original content, or 2) content conglomerated in a completely original fashion. This goes along the duplicate content filter that is talked about so much
Sursa.