After selecting some keywords to develop your blogger contents, you need to add your keywors in your blogger.
In the tabe Edit Layout, you need to use meta tag to add your keywords for your blog.
For example:
If your keywords are bogger template, web blogs and SEO tips, then the line will be like this:
This is a meta tag has name "keywords"
<meta content='bogger template, web blogs and SEO tips' name='keywords'/>

And you also need to add one more meta tag to descript about your blogger
For example:
This is a meta tag has name "description"
<meta content='The most beautiful blogger templates, blogger template, blogger techniques, web templates' name='description'/>