For SEO friendly Magento development, you should prepare Magento theme such a way that it should have other JavaScript and CSS in an external file and should have minimum numbers of files in the template so you can improve the performance. You can take help of cache in the improvement of performance by enabling it.
We usually are tempting to go on default themes available in the market and sometime for the somewhat customized themes. At SEO point of view, these default themes are not doing good job for the usage of proper headings from SEO perspectives and leave plenty of painful work to do for the enhancement for the Magento developers.
Shoaib Marfatiya is a wordsmith with a knack in technical content writing and SEO content writing.There are plenty of content on his credit like articles, blogs, press release, etc. and all with written at SEO point of view and keeping readers in mind.