From the Vim-Latex FAQ:
Q: What are those annoying «» characters whenever I invoke a
mapping?
Those are called placeholders and when you get used to them, they
will prove invaluable. They are essentially markers left in the text
file to tell latex-suite where the next point of interest is. This
lets you directly go to the next placeholder with a single key-press.
Consider a working example. Pressing EFI will insert the following
micro template:
\begin{figure}[h]
\centerline{\psfig{figure=«eps file»}}
\caption{«caption text»}
\label{fig:«label»}
\end{figure}«»
The text «eps file» will be selected and vim will be left in
select-mode so that the user can continue typing straight away. After
having typed in the file name, she can press Control-J (while still in
insert-mode). This will take her directly to the next "place-holder".
i.e, «caption text» will be visually selected with vim in select
mode again for typing in the caption. This saves on a lot of key
presses.
If you still do not feel like using placeholders, include let g:Imap_UsePlaceHolders = 0
in your .vimrc
.