RE: IS THERE ANY ADVANTAGE OF SAVING UPVOTES ?
Currently your "voting power" regenerates 40 votes per day. As long as you don't vote more often then 40 times, there is no meaning in "saving" votes.
With the next Hardfork, likely on the 20th, that number goes down to 10 - but your voting weights 4 times more (so in effect the same).
You can split your voting power on more votes by using the slider when voting. but if you are new you likely do not see it, you need more SP first.