With beamer package, the description environment can use an optional argument: a text to fix the maximum width of terms (cf. section 12.1 "Itemizations, Enumerations, and Descriptions", p.113 of beamer guide v3.26).
Example:
\documentclass{beamer}
\setbeamercolor{normal text}{bg=cyan!10}
\begin{document}
\begin{frame}
\begin{description}[Other description]
\item[Name] Joel Spolsky
\item[Address] Some address
\item[Other description] Some description
\end{description}
\end{frame}
\end{document}

How to align items to the left
By default, items are aligned to the right. To align items to the the left :
in your preamble, define the predefined option align left for the template description item:
\defbeamertemplate{description item}{align left}{\insertdescriptionitem\hfill}
apply this prefined option before a description list:
\setbeamertemplate{description item}[align left]
Example:

\documentclass{beamer}
\setbeamercolor{normal text}{bg=gray!5}
\defbeamertemplate{description item}{align left}{\insertdescriptionitem\hfill}
\begin{document}
\begin{frame}
\begin{block}{Default}
\setbeamertemplate{description item}[default]
\begin{description}[Other description]
\item[Name] Joel Spolsky
\item[Address] Some address
\item[Other description] Some description
\end{description}
\end{block}
\begin{block}{Align left}
\setbeamertemplate{description item}[align left]
\begin{description}[Other description]
\item[Name] Joel Spolsky
\item[Address] Some address
\item[Other description] Some description
\end{description}
\end{block}
\end{frame}
\end{document}
itemsto left? – MYaseen208 Mar 04 '14 at 17:08\setbeamertemplate{description item}[align left]globally? Thanks – MYaseen208 Mar 05 '14 at 04:55\hfill\insertdescriptionitem, you can't align to the left... – Paul Gaborit Oct 31 '20 at 22:51descriptionenvironments were all shifted to the right, like with some additional margin. Thanks to this answer, I got the idea to use the optional argument[~]and everything got back to the normal left alignment of the slides as it should. – Olivier Jan 20 '23 at 16:05