Avoiding Black hat SEO

[davidsmith]

It may happen, and it has happened that some of the techniques that were done by webmasters use to get the website a better positioning in SERPs were overused and became spam. Hence it was labelled as black hat technique. Search engines bring a penalty to stops the abuse of such black hat techniques.

[MilesWeb]

Black hat SEO includes some non legal activites in SEO.

[tusziget]

I think best thing is to study for a long time the SEO,and build up a good website.Don't use other things,which anyway are for short term.