We all have to start somewhere.
Meta-data can best be described as a small report / description providing information about a specific dataset.
So its data describing data.
It is best practice when distributing information (in this case spatial information) to provide a metadata file within the data package. this information describes who generated the information, what projection was used, how the data was generated...etc... basically information which will help a user months / years down the line understand the thought process as to how this information was generated.
There are different types of "formats" - i.e. ISO and FGDC
There are also different programs / add-ins / plugins around that are designed to make the process of capturing this metadata easier. I have a feeling the tool you used was to help in preparing the meta data for a dataset.
If you want more info...here is a link:
Getting back to your question, you cannot convert meta data to a spatial dataset - as far as I am aware. Maybe if there were spatial coordinates stored as text you could...but generally you can't.
The link you provided appears to be of a viewer for this particular dataset / agency.
The best bet would be to try and contact the originator of the information to get a copy of the Geodatabase / Shapefile of the streams layer being presented. It appears the site needs a login, so getting a login may provide you with more options to get access to background information.