Does your present site domain name don't say really match your niche ?

let say , a domain name , like electronics.com but your niche is gadgets stuffs. not like electronics device , parts etc

That example isn’t the best, though, since that domain name does pertain to the gadget niche. You could probably run into some issues if your domain doesn’t match your niche at all. But then again, some businesses manage to push through regardless, because the domain name is so connected to their brand. For example, penguin.co.uk isn’t a site about penguins, but since Penguin Books are such a household name in the publishing business, it doesn’t matter. You certainly shouldn't be worried if your domain is only a little ways away from your niche.

It is good to have also the domain related with the niche as that will help with CTR on Serpstoo, but if you have found a good domain on auctions then you should really use it.

Amazing example Geasy . Hahahaha !