Day trading has become a popular concept among those venturing into the financial markets. It is a method where traders buy and sell a security within the same trading day, hoping to gain from small market moves.

But what exactly does day trading involve? Simply put, day trading entails the quick buying and selling of securities over the span of a single trading day. The aim is to profit from quick market variances.

One of the main advantages of day trading is the potential for quick profits. As a day trader, you're regularly on the lookout for opportunities to make the most of small price changes. Another advantage of day trading is that it can be done from almost anywhere, as long as you have a computer and a reliable internet connection.

However, it's also essential to mention that day trading carries its setbacks. The same rapid market changes that can make gains can also result in losses. Hence, it requires a certain level of knowledge, self-control, and tactics to be successful.

So, how might one become successful in day trading? Let's outline some key tactics:

1. Initiate with a Solid Trading Plan: A well-defined trading plan can act as your roadmap to achieving profit.

2. Utilize Technology: Good day traders leverage the latest technology tools for understanding market patterns and making appropriate trading decisions.

3. Keep Emotions in Check: It is essential to hold trade the day onto a disciplined and rational approach to prevent reckless decisions driven by impatience.

4. Diversify Investment: Spreading investments between various fields helps to lessen the risk.

5. Keep Learning: Even experienced traders regularly educate themselves about the latest market patterns and trends.

In summary, day trading offers an exciting way to get involved with the financial markets. But, it requires dedication, skills, and a consistent trading plan to gain success. Always recall that while the rewards can be considerable, so too can be the possible losses. Therefore, it's advisable to approach day trading with a calculated mindset and the willingness to learn. Happy trading!