I participate in a variety of affiliate programs.
Affiliate programs use other people's websites to advertise. If you "click" through that ad and buy something, the website owner gets paid.
I use these monies to defer some of my expenses for operating this website.
I have a strong affiliate program policy. For example, I fully disclose my affiliate relationships and provide alternate non-affiliate links. For more information, including links to all my affiliate programs, see my Affiliates Page.
I also request that everyone help me to monitor my affiliates. For full details, see my Affiliates Page.
If you click these links to buy something, the company is supposed to pay me a little money for the "referral". But please don't think that buying something is necessary or even expected. I am not trying to "convince you". I provide my website "just 'cause". Please feel no obligation at all to use these links. Only buy if you want to.