Fruit is an important part of any diet. It provides fiber, hydration and energy along with a combination of flavonoids, antioxidants, minerals, vitamins, phytochemicals, and countless micro- and macro-nutrients so fruit is very necesary for your bird's health.
Most birds enjoy this addition to the diet but there are some things to consider when selecting and feeding fruit.
Your bird can only consume so much volume in a day and, like any other creature, they will go for what tastes best not what's best for them.
Not all fruits provide high levels of vitamins and nutrients so look up the nutritional value of the fruits you are feeding ... you might be surprised.
Go for the fruits that will provide the most nutritional benefit.
Look up nutritional values for everything you feed or anything that others say you should feed; it takes a second and you might be surprised at what you discover.