What are "Base" and "Top" columns?

Base shows the first rank ever recorded on PRT. By default, it shows any rank including NTH (Not Top Hundred). You can change to "First <100 rank" (show the first rank that was above NTH) in PRT Settings -> Base value

Top shows the best rank the term has ever had in the time it’s been tracked.

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What do the Rank, Day, Week, Month columns mean?

Rank – The current rank Day – The previous rank (one day ago) Week – The rank...

I've just added a new URL/terms and I don't see the global and local traffic volume. Why not?

Please wait. Global and local numbers can take up to a day to get updated.

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What is the "Term Combination" column?

In this column you can see the overall setting of the term: Search engine, Language &...

Where can I view the note I've entered when I've added the URL?

The note (if it exists), is shown in the "i" icon at the top right of a URL's box.