Alrighty, here ya go! ^w^
Here's mine.
Vulperra is a world filled with blue foxes and various beasts. The series will mostly follow the adventures of the legendary hero Flash Gauntlet, but there will also be tales of other characters from around the world.
Here's the desc. for Leftovers
"A jazz musician with a dream to make it big finds out that she's not that great."
I tried to keep it short and sweet so the desc. could be interpreted different ways :^)
"The Fomor and the humans have been at war so long, nobody can quite remember why. However, when Balor - a Fomor soldier - and Cethlenn - a human witch - cross paths, things may change forever.
A lesbian tragicomic."
im never really satisfied with my descriptions, and ill prolly get around to changing this one eventually. good advice ive received on descriptions is to think about what your storys about, and how you want to sell it. is your priority a certain character, or group, or relationship? is it a part of the story? do you want people to come for romance, action, humour?
This webcomic is read right to left.
RAIJU - humanoid vampiric beings that appear to feast upon the life force of humans; or as scientifically and perhaps philosophically coined; Apeiron. European based international agency, SYNAPSE is charged with eliminating raiju.However terminations as they claim are rather quite low and little information is gained.
After Nitsuke Hamasaki and Nazumi Akimitsu- two Japanese junior high students- have a fateful encounter with raiju one day in which they narrowly survive, they are left to make a decision; continue life as normal or, delve 'deeper' into the dark universe they truly live in and take up arms against a force to be reckoned with that they know little to nothing about...
As someone said earlier I think you should start by giving the setting.It can even give a slight hint to the atmosphere of the story as well -great for thrillers and such. Next u give a little insight to the characters (I suggest u give more than one character depending on what u think the overall premise is).In mine described two I could've done more ofc that are also main characters but I just left it at two which makes a little more sense when I get to the last part. YES I DID SORT OF SPOIL PERHAPS THE FIRST PART OF THE STORY. But while I described the antagonists' functions the readers probably don't know what they look like. Introducing the conflicting forces like SYNAPSE and such gives the reader a feel of possible depth which makes introducing just just two characters pretty ok since with the description overall it implies that perhaps the story is bigger than just the two chars there could be many more that build up the story's dark secrets. Lastly asking a question of sorts which gives insight to the plot while also AGAIN hinting at the atmosphere (in my case the dark premise my characters will delve into to find truth) is a great way for all kinds of stories to make intriguing impressions upon the reader *ASSUMING THAT THEY READ IT ANYWAY: as clearly we have seen in prior posts to this one that SOME PPL JUST DONT READ THEM. Sometimes they like surprises so they can full immerse in the world they're getting into and some just let the artstyle and colors whether prismatic VIVID or dark do the talkin'.
Ok ik it was long but I really hopes this helped ya out a lot 
This is the one I use: "A fantasy adventure web comic about an alien named K whose thirst for adventure and discovering the unknown get her in all kinds of situations, K and her chaperon Phil explore far off planets in search of dungeons and abnormality's, in hopes of fortune and knowledge."
But for a short summary I usually use: "A ragtag group of aliens come together to kill God"
Nora and Ester figure they’ll never go any place more interesting than the nearest mid-sized town, but they’re not going to do anything about it besides complaining. When things take a turn and they’re accidentally mixed up in the affairs of an interplanetary drug cartel, they’re determined to come through with as little effort as possible.
Updates Fridays.
Originally, mine went something like "A sci-fi adventure story in a science fictions setting about characters in a difficult situation and their ways of dealing with this." But it was pointed out to me that I needed to be a bit more specific, since it basically said "stuff happens to characters and they do things". I think the tone of the description should resemble the tone of the comic, in regards to both dialogue and narration.
don't know if you need anymore but here is mine! It's sort of a sci-fi, fantasy adventure at the moment
17 days later
Mine is "Boy meet boy and together search their origins " and is so dull I'm ashamed, but is very hard for me describing my comic >_<
Is like doing a resume about yourself. So much troubles.
After Josie manages to warp herself and trap herself in another dimension with a magical mirror, she also has to make sure to keep clear from the sinister criminal Erena and her helpers while traveling around the dimension, who the mirror originally belonged to.
2 months later
let me see what kind of description i can choose:
Mad Pigeons,a classic style and "silent" comic strip, with pigeons completely out of their mind and filled with,slapstick,alt and ...wtf humor?!
And the other is about alt hist that i can experiment in styles like a mad doctor our like an exprection of my ou my soul:
This is my comic2
Dangers lurking every rooftop! Will Roof girl be able to save the day? followed by a bunch of links to my twitter and stuff
On topwebcomics.com my description is:
ROOFGIRL is about a GIRL who is on a ROOF
In a world where gods and humans regularly interact, their connection is facilitated by the Demigods, three reincarnating beings marked with a golden eye.
One demigod sets out to distinguish herself from her past selves, starting with her name.
Loi is tight on budget, so he was force to live on a very cheap "HAUNTED" apartment where he will meet "Maya" the Ghost that will haunt him forever~
Here's mine for my comic The Changeling's Sister 
-- Updates every other Tuesday in odd weeks --
Rose's twin sister is kidnapped by a fairy and replaced by a doll. She is the only one who sees the difference, and the doll treats her horribly, until she one day has enough of it and goes searching for her real sister.
Basically I just referenced the whole plot of the first chapter.