This is a HUGE question. Do some of your own research and come back with something more specific.

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Guest posting is another writing skills, writers create contents and publish it on different blogs.

How do you go from: http://www.warriorforum.com/search-e...-rankings.html to this thread? I mean both in terms of SEO knowledge and English? Is the other post something you just copied without giving the author credit?

Explain? Why? Do your research....

Forget all 3, and your headaches will disappear.

Then do some real research on what you should be putting your efforts into.

Read this forum.

Paul

For infographic you can use piktochart site... Guest posting is something SEO people don't need to worry about. Tell your content writer to write some unique post and submit. You just help out him/her in adding keywords and other meta tag works.There are many web2.0 sites like wordpress, blog.com, blogger,webs, weebly, tumblr,myspace etc.. you just need to submit unique quality contents to these sites regularly.. Simple..

Infographics - Information graphics or infographics are graphic visual representations of information, data or knowledge intended to present information quickly and clearly. They can improve cognition by utilizing graphics to enhance the human visual system's ability to see patterns and trends.

Guestposting - Guest posting” means writing and publishing an article on someone else's website or blog. I offer this on my own site (occasionally) and do it quite a bit on other blogs with audiences that I want to speak to. It's a great way to connect with new readers and get your name out.

Web2.0- Web 2.0 describes World Wide Web sites that emphasize user-generated content, usability, and interoperability.

What I will suggest you is that use the infographics in your guest posting or as an image in your web2. It will be very effective for capturing the attention of viewers on your content easily. Infographics is the best method of providing info of any company through graphics.