A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
if a question is about amazon-codedeploy
if a question is about minikube
about the CI template of bitbucket, i.e. bitbucket-pipelines, then this tag could be used.
if a question is about terraform-module
if a question is about ssh
The command line and other Unix-like aspects of Apple's macOS
if a question is about flask
if a question is about Istio, which can be used to connect, secure, control, and observe services.
if a question is about VMware
For questions about Atlassian's Jira Software (aka Jira), originally an issue tracking tool which evolved into a full-blown software project management system for agile teams.
if a question is about certbot
For questions about Ansible Vault - an Ansible feature that allows keeping sensitive data in encrypted files rather than in plain text in various configuration files.
For questions about the Hypertext Transfer Protocol (HTTP), which is a network protocol used for transferring content on the World Wide Web.
For questions about immutable servers, which are servers on which no changes can be made.
for questions about the CircleCI 2.0, which went into closed beta in November 2016. For the current version of CircleCI use the [circleci] tag.
if a question is about aws-elb
for questions about VirtualBox, a free and open-source hypervisor for x86 virtualization which can be installed on Windows, macOS, Linux, Solaris etc.
if a question is about aws-codepipeline
if a question is about AWS ECR.
if a question is about authenticating or login to a service, e.g. google, github
if the question is about monorepos, i.e. a git repository that contains multiple projects instead of one git repo for every project.
For questions about capacity planning, which is about estimating various IT resources required over some future period of time.
if a question is about npm