Your website title, and description identify who you are, and these are easily customizable on your customize panel.

• Customizing your website title does not change your unique blog domain. This is a separate input for your website only.
• Description input allows simple HTML tags such as <br>, <b>, or <i>. 
• You can only input 2000 characters max for your description, and 50 characters for your title.
• Some themes may hide descriptions, and title by default, but they may show up in a hidden menu. 

Don't forget to save your options. Your new inputs will be ignored if blank.