horizontal alignment

The text-align property allows you to set the horizontal alignment for the content relative to the element box. This property can also be attached to the <col> or <table> element. The 'text-align' property is inherited by all the child elements when applied to the parent element.

The possible values are

center | justify | left | right
<string>(only for table cells; eg text-align: ".")

The default value is left.
The <col> setting has a greater priority that the <tr> setting.

span {border:1px solid red;}
<td style="text-align:center">center align text</td>
<td style="text-align:justify">justify align text</td>
<td style="text-align:left">left align text</td>
<td style="text-align:right">right align text</td>
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