Google Affiliate Network: where are the ads?

I signed up for Google's "Affiliate Network" to try it out with just a few ads on a few of my web page and see how it works. So far I have been approved by several advertisers to allow their ads on my web site. But what is not clear is how I get their ads onto my web site. The usual way this is done is that the advertiser provides a small bit of HTML code I put in my web page, which then displays the ads and includes my account code so I can be paid for the ad. I have the list of advertisers, but can't see how I get the ads.

From the help site, it appears the ads are called "links". It took me some time to work out I could go to a page "get links" and this would generate a list of the available advertisements. For here I can select the ad, size and have the required HTML generated. I started cautiously, putting what I hope is an uncontroversial ad on a transport and smart apartment web page.