On (a): Reddit can be extremely useful as a search engine. Adding site:reddit.com to a search for, say, a product or troubleshooting, will generally give you be

On (a): Reddit can be extremely useful as a search engine. Adding site:reddit.com to a search for, say, a product or troubleshooting, will generally give you better results than the Google default. It's also pretty good for search for local issues (e.g., "Where can I find X in Y?") and for quick answers that are usually buried under a whole blog post otherwise for SEO purposes (e.g., "How do I unlock secret X in game Y?"). The latter Google default search will give you blog posts that get to the answer after several paragraphs of "Game Y is a game full of secrets, which is why gamers really love it" and "Secret X is really a game-breaking weapon that will make your character extremely strong for the last half of the game." In short, Reddit serves a purpose that Google used to serve.