The most common reason that the site Title doesn't show is that the theme you have selected requires the Title at the top be a Logo Image. Some themes display the text and others require a logo.

In general, most of the StudioPress themes will display text and most of the Elegant themes will require a logo.

You can either select a different theme or use one of these services to create an image logo.

(free online image editor)  http://apps.pixlr.com/editor/

Many of these are free to design your logo, then you pay for the final product...

www.logomaker.com

http://www.graphicsprings.com

http://cooltext.com

You can even try a service like  www.fiverr.com

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