The cookies Google Analytics, Facebook, Twitter and LinkedIn are used by iotspot. These are - anonymously or not - used to examine how the website is used and to make sure you're signed in to your personal account on the social networking sites. Cookies on the social networking sites are used only with your prior consent.
The website of iotspot makes use of internet tags. Internet tags (also known as single-pixel-GIFs, invisible-GIF's or 1-on-1-GIFS) are smaller than cookies and provide information to the website serve, about for example your IP-address, your page views, the type of browser you are using, your computer brand and what information your are viewing.