Push notifications are a way of getting alerted about new research. Say you are interested in keeping up to date about acupuncture / IVF research; rather than having to replicate your search each month or couple of months to see what is new, you can set up alerts that will automatically notify you when new material is published that meet your criteria. If you've ever used RSS feeds, you are already familiar with this concept: instead of visiting every website that you like, you can subscribe to the RSS feeds of your favorite sites, which will be aggregated into one place (your RSS reader) for your viewing pleasure. Here are a couple of ways you can use push notifications to stay up-to-date one newly published medical research.
You can also get notifications from specific journal publications about newly published articles that meet your search criteria. Most journals allow you to sign up for notifications by visiting the journal page on the publisher's site.
If you see this icon: 
it mean that an RSS feed has been detected. In a nutshell, RSS feeds allows you to aggregate content from web resources (such as blogs, news sites, or in this case, an online journal) so you don't have to visit every site that you are interested in keeping up with. For example, you could follow the RSS feeds from a couple of acupuncture blogs you like, get updates from Pubmed about all the new articles that have to do with acupuncture and pregnancy, and be sent the table of contents for each new issue of Fertility and Sterility. By using an RSS reader (such as Pocket, Feedly, or Instapaper), you can view all of this information in one place -- you don't have to just periodically check each of these different websites for updates. Instead, the updates come directly to you.
If you are interested in more general interest stories or medical topics in the popular press, you can also get Google to send you alerts when new pages with your search terms hit the internet. Login to your OCOM email account (or your personal gmail account) and go to: https://www.google.com/alerts. Enter your search terms and your email preferences and voila! You will magically get an email when there’s something new on the topic on the internet. (And you can totally use it for vanity searching, we won’t tell!)