Sometimes you may want a copy of your working tree without any of those .svn directories, e.g. to create a zipped tarball of your source, or to export to a web server. Instead of making a copy and then deleting all those .svn directories manually, TortoiseSVN offers the command TortoiseSVN → Export.... If you execute this command on your working copy you'll be asked for a place to save the clean working copy without the .svn folders. By default, only the versioned files are exported, but you can use the Export unversioned files too checkbox to include any other unversioned files which exist in your WC and not in the repository. External references using svn:externals can be omitted if required.

Another way to export is to right drag a working copy folder to another location and choose Context Menu → SVN Export here or Context Menu → SVN Export all here. The second option includes the unversioned files as well.

If the target folder already contains a folder of the same name as the one you are exporting, a new folder will be created with a (n) suffix, eg. Target (1).

And of course you can export directly from the repository too. Use the Repository Browser to navigate to the relevant subtree in your repository, then use Context Menu → Export.