The Inquirer has a handy overview:
MS15-106 A cumulative fix for 14 CVE-listed flaws in Internet Explorer. These vulnerabilities can be exploited by webpages to hijack PCs.
MS15-107 Cumulative fix for Microsoft Edge, two CVE-listed flaws patched: one, a cross-site-scripting protection bypass, and the other an information disclosure bug that could be used to further attack the computer system.
MS15-108 Four CVE-listed flaws in VBScript and JScript in IE versions 7 through 11. Specially crafted webpages can execute code outside the aforementioned scripting engines, and do what they like to the system as the logged-in user.
MS15-109 Two CVE-listed flaws in Windows Shell. "The vulnerabilities could allow remote code execution if a user opens a specially crafted toolbar object in Windows or an attacker convinces a user to view specially crafted content online," Microsoft explained in its advisory.
MS15-110 Three CVE-listed vulnerabilities in Excel, and Sharepoint Server. Opening a malicious spreadsheet can trigger the execution of code within the document to take over the PC as the logged-in user.
MS15-111 Five CVE-listed flaws in the Windows kernel, the worst of which can be exploited by software to gain administrator access on a system.