In short, press request alerts are requests for sources of information from journalists. Let's say you're a journalist putting together an article on wearable technology for The Guardian. Perhaps you need a quote from an industry expert or some products that you can feature within your article? Well, all you need to do is send out a request to a press service and you can wait for someone to get back to you.
But if someone performs a search for Moz, well, guess what? I mean we can nail that sucker. We can definitely rank for that. Google is not going to take away our ability to rank for our own brand name. In fact, Google knows that, in the navigational search sense, they need to provide the website that the person is looking for front and center. So if we can create more demand for Moz than there is for SEO tools, which I think there's something like 5 or 10 times more demand already for Moz than there is tools, according to Google Trends, that's a great way to go. You can do the same thing through your content, through your social media, and through your email marketing. Even through search you can search and create demand for your brand rather than unbranded terms.
If you were to ask someone what the difference is between direct and organic website traffic, they would probably be able to warrant a good guess, purely based on the terms’ wording. They might tell you that direct traffic comes from going straight into a website by entering its URL into a browser or clicking a bookmark, while organic traffic comes from finding the site somewhere else, like through a search engine.
Remember when you used to rely solely on search engines for traffic? Remember when you worked on SEO and lived and died by your placement in Google? Were you #1? Assured success. Well, okay, maybe not assured. Success only came if the keywords were relevant to your site users, but it was the only real roadmap to generating site traffic and revenue.