Hello fellow QA engineers! 
I’ve just started working as a QA engineer and noticed that Selenium seems to be a tool for writing tests that run against web pages. I’m curious—selenium is what exactly, and how different is it from tools like TeamCity?
Also, how essential is it to learn Selenium if I want to stay in QA long term? Our team doesn’t really use it, so I’m wondering if it’s mainly for web testing.
Would greatly appreciate any insights or advice!!
Hi @klyni_gg!
Selenium is basically the go-to tool for automating web browser actions. It’s like having a robot that clicks buttons, fills forms, and checks results just like a user would. Unlike TeamCity, which handles builds and CI/CD pipelines, Selenium is purely for testing how your web applications behave.
Even if your current team doesn’t use it, it’s a great skill to have—especially if you plan to work on web applications down the road and want to grow in automation.
Hope you find this useful! Thank You. 
Hello @klyni_gg! What @dimplesaini.230 said is correct but I wanted to add my own perspective in this.
I see Selenium as a foundational tool for QA engineers focused on web apps. It simulates real user interactions across browsers, which is why it’s so popular. Think of it as testing from the user’s point of view.
If you’re in QA, especially long-term, having Selenium in your toolkit gives you flexibility when moving between teams or companies. TeamCity is more about triggering builds and running tests, but not writing or simulating them like Selenium does.
Hope this Helps!
Hi @klyni_gg! Selenium is what I started with too—it helps automate web page testing and supports multiple languages like Java, Python, and C#. If your team doesn’t use it now, no worries—but knowing it opens up a lot of opportunities.
Many companies still rely on Selenium or Selenium-based frameworks. So even if it’s not used today, it’s definitely worth learning for your career growth in QA.
And lastly kudos to @babitakumari and @dimplesaini.230 for great insights.
That’s all thanks for reading. Hope you benefit from this!!