By now, it should be a familiar adage: For such a simple idea, Twitter is a tough service for newcomers to figure out. But now, in the days before its IPO, the company is putting on its best face for the public. On Monday evening, Twitter quietly rolled out an entirely new “About” section on its company homepage, giving it a near-complete visual refresh while adding a number of detailed, informative sections. Much of it is what you’d expect from a company on the verge of going public — a press section, a rundown of executive bios and headshots, a list of Twitter’s milestones and high-level data points. The most telling section, though, comes at the bottom of the company’s products page, an icon that beckons you to discover what you can do with Twitter.