Which is the best extension for magento SEO?

[abilitydesigns]

Hi, can anyone suggest a good magento SEO extension please? Some of the tasks i can foresee would be:
changing <title> tags of various pages
structured data mark-up
rel=canonical
301 redirect

Thank you.

[Elise Willis]

Hi,
i think Magento itself is a SEO-friendly e-commerce platform and if you need a magento SEO extension, may be Ultimate SEO Suite by Ahead Works or SEO Suite Pro can help you.

[Andrea552]

Instal these SEO extension into your Magento site
Yoast_MetaRobots
Canonical URL
SEO Suite Pro
MSemantic Basic
Extended Sitemap
SEO Layered Navigation