The phrase "a key location" is correct and usable in written English.
It can be used to refer to an important or strategic place relevant to a particular context, such as a business, event, or geographical area.
Example: "The conference will be held at a key location that is easily accessible for all attendees."
Alternatives: "a crucial site" or "an important area".
"It's a key location in the New England area.
Constantine's water supply, and a key location in "From Russia With Love" (need we say more?).
The event was held at the Onllwyn Miners Welfare Hall in the Dulais Valley, a key location in the Bafta-winning film.
Executives at CBRE in Hong Kong said last October that the space constraints meant the city's standing as a key location in Asia was "under threat".
Leipzig in particular is an important national transport centre, owing to a key location in the national rail and highway networks.
Stranger still was no mention of the fact that Whitby is a key location in Bram Stoker's Dracula – possibly because the main character reacts even more violently than Clarkson once did when struck by hunger.
Since two hiragana characters were associated with a single key location in the overlapped mapping, this would produce interference early in the training.
This is not a rave; it's barely a festival, but rather a conference during the day with some exposition through musical performances at a few key locations each night, all centrally located in downtown Montreal.
Why? AK: I honestly thought after the complications of The Warrior that this would be a simple film: three people in a tent in one key location.
Although there has long been a considerable international trade based on the country's key location as a crossroads, modern industrial development began mainly after World War II.
This article is a brief primer on the key location technologies that are emerging.
