The daily chart is your bread and butter timeframe. It is meaningful because many traders act end of day or use the daily closing price as a signal generator for the next day. Thats why you often see a continuation or carry over of end-of-day action into the next trading session.
While I also employ the weekly, monthly and 15min charts, I don’t think my trading would suffer much if I had to rely only on the daily. In my opinion one should actually focus almost all of the time on it while only checking the weekly every once in a while. I like to put the (messy but useful; PLL anyone?) volume-by-price indicator on my weeklies so that my dailies remain clean and easy on the eyes. I also check the weekly to judge the quality of bases.
Oftentimes a stock appears choppy on the daily, but when you check the weekly a lot of the daily noise is hidden. I sometimes dismiss non-ideal daily price & volume action when it’s hidden in a very constructive weekly chart. Reason is that big money rather focus on the long term. They accumulate based on the weekly/monthly and fundamentals.