If you are being funded by a university, national, or international funding body for your research, it is likely the funder will have requirements about research outputs (including publications, underlying data, and conference presentations) being published Open Access.
If you are unsure of your funder's requirements, you can use the Cambridge Open Access website's guide to funder open access policies (link opens in new window) to check. The Sherpa Romeo website (link opens in new window) will help you find out whether a particular journal allows Open Access publishing or self-archiving. Cambridge Open Access also has a guide on publisher policies (link opens in new window).
The University of Cambridge also has 'read and publish' agreements with a number of publishers. This means that authors can publish their articles open access with the journals covered by the agreements, without paying a fee -- provided the corresponding author has a University of Cambridge affiliation. You can read further details (including a list of the publishers with such agreements) on the Open Access website (link opens in new window).
Generally it is a requirement that all University of Cambridge research outputs (PhD theses, articles, books, datasets, conference presentations, and more) be deposited in the institutional repository, Apollo (link opens in new window).
When choosing the right journal for your publication, you may need to balance several different factors. These are likely to include:
Sadly, there are some disreputable and unscrupulous publishers out there. Publishing with such outfits is not a good idea. The website Think, Check, Submit (link opens in new window) offers some guidance on things to watch out for when determining if a publisher is predatory.
Claire Sewell, Research Support Librarian (Physical Sciences) has also created a webinar (link opens in new window) on how to spot a predatory publisher.
You should not use citation metrics as the sole factor in choosing where to publish. There is no reliable way to accurately determine a journal's impact, and different platforms will give different impact factors for the same journal. However, should you wish to gain an impression of a journal's citation metrics, the following tools may help:
It is worth noting that Scopus only counts citations in journals which are indexed by Scopus, and Clarivate Analytics only counts citations in journals which it indexes.