If you’re running for president, you need to know your swing states and you need to visit them frequently.
States that have been voting the same party for decades, and are party loyal, are places where you can raise a lot of money, but know that if you spend your resources elsewhere you probably won’t lose their vote.
For example, if you’re a Republican you’re probably going to get Texas’s Electoral Votes. And if you’re a Democrat, then you’re probably going to get California’s votes. That’s just how it is.
One the other hand, since swing states aren’t party loyal, they can give the candidate an extra boost they may need into to win the election. Candidates are always making sure to stop in Florida, Ohio and Colorado. It usually comes down to those states in close elections to determine who the President of the United States is.