Yes, they are. The Halo novels are often regarded as part of the official Halo universe and contribute to the overall lore.
Not all of them. Some Halo novels might have been superseded or revised based on later developments in the Halo universe.
Yes, it is. The Halo: Fall of Reach novel is widely accepted as canon within the Halo universe.
Yes, usually light novels are considered canon if they are officially recognized by the creators or the associated franchise.
It depends. Some consider them canon, while others have doubts. It's a bit controversial.
Yes, they are. The Warcraft novels are often regarded as part of the official lore and contribute to the overall story of the Warcraft universe.
It depends. Some Naruto novels are officially recognized as canon and contribute to the overall Naruto story, while others are not.
The canonicity of Bleach novels can be a bit murky. Some novels might expand on the existing story in a way that fits well with the main plot, but others might introduce elements that don't quite align. It really varies from one novel to another and how closely they adhere to the established lore of the series.
Yes, they are canon. They expand the lore and universe of the related franchise.
It depends. Some web novels are regarded as canon if they are officially recognized and tie in closely with the established fictional universe. But many are not.
It depends. Some FF7 novels are officially recognized as canon, while others might be more supplementary or spin-off material.