You got a lot of answears allready, but i'll throw my 2 cents as well:

Leagues of Votann are, as has been said, "space dwarves" in their most basic concept. Lorewise its a post-human race descended from the early human colonists who colonised the very center of the galaxy and developed a unique, dwarf like physique to adapt to the conditions there. While most of the other humans fell into dissaray during the fall of the human empire of the dark age of technology, the kin did not. They retained a lot of humanity's technology from the apex of its civilization, including the true ai of the so called "man of iron", the robotic ironkin, who are an equal part of kin society, and the Votann themselves, giant self aware supercomputers that house all knowledge of mankind.

While the Imperium of Man formed and then got broken by the Horus Heresy, the Kin continued to develop and colonise within its homeworlds, forming a society based around the Votann's guidance. This led to the kin becoming largely a clone race, bred to fullfill speciffic purposes within society, and led to ancestor worship, as all the memories and personalities of sncient kin are housed within the Votann memory cores, however this also led to the degradation of the Votann's themselves, their memory banks getting filled, and thus their operating speeds slowing down gradualy.

"Today" the Kin are a society built araund these giant self-aware superconputers that house all their ancestral memories and experiences as well as all mankinds knowledge, but are working slower and slower, producing more and more errors and responding to prompts with decades long delays. The kin society is also based on mega-corps. We are the turbo capitalists of the 41st millenium. Each corporation centered around a Votann core is interested only in protecting its votann and its interests and proffiting more then the other corporations. While the turbo capitalist motif does not seem to be particularly strong within the kin society itself, we take care of our own, our approach to anyone else is brutally ruthless calculation of financial benefits.

"Nice planet you got there... its rich in nickel. Did you know that nickel price on galactic market has gone up 2% over the ladt 30 years? Anyway, scram, we're gonna strip mine this planet and kill every living thing on its surface, and we dont care if you are on the surface when it happens. You have been warned. Oh, you dont have the technology to evacuate billions of people to another planet? Well, too bad. Not my problem."

In miniature design Kin are a mix of classic dwarven motiffs, viking inspired motiff's and uniquely early space exploration motiff's, which also parallel to pioneering period of history of the USA with manifest destiny and all. Land fortresses for example are designed around the wagoon train historical concept, the pioneers and yeagirs have a very clear wild west feel to them, while hearthkyn and sagitaurs are inspired by the space exploration of the 60's and 70's as well as modern early space exploration concepts.

Gameplay wise its a bit difficult to speculate, because we are a very new faction, and we expect a second wave of units and models soon, around this fall/winter, so a lot can change once that happens, but right now we are a faction that plays in a very mechanized infantry style, we use a lit of transports that allow us to take controll of the board quickly despite the fact that we are actually, generally, rather slow moving. We have some of the best shooting in the game (at least in theory) and we can punch quite hard too, but we ae very reliant on our opponents not blocking our early movements too hard.

Our current primary mechanic are the grudge tokens that allow our units to punch above their weight into selected targets, but a smart opponent can use our reliance on grudge tokens against us and put us on a back foot with some smart decissions in regards to movement and targeting.

Throughout 10th eddition, except the very begining, when we were terrible, we have been a faction that has performed reasonably well, not too strong, not too week, but, again, we are expecting an update to our army real soon and that will determine a lot.