Apologies for a silly question but I am on Ansible 2.7.0 so why announcement made for 2.5.11 and 2.6.7? I would have expected the announcement of 2.7.1 or 2.8.0 something like that?
Ameya, Ansible has major releases in the form of 2.x and each of these releases contains new features and fixes. Periodically we also release a minor or bugfix release of these major versions (list 2.5.11 and 2.6.7) that contains bugfixes only. This allows people to take advantages of fixes in the latest development version of Ansible without waiting a few months for the next major release. Currently 2.5.x will only contain security fixes like a CVE fix, while 2.6.x will continue to receive major bug fixes and 2.7.x minor fixes. This shuffles along a version once a new major version of Ansible is released. Have a look at https://docs.ansible.com/ansible/latest/reference_appendices/release_and_maintenance.html for more info.