Moreover, realize, that to produce a vital tone, it does not suffice merely to provide the correct weight and corresponding exertions. On the contrary, to make use of such weight and hand exertion effectively, you must always carefully direct and time your finger and hand exertions along with the weight release.
That is, you must insist on giving the proper acceleration to the key during its short journey downwards. In other words, you must "think the key" unremittingly. Also, remember that this acceleration must always be "using an increasing ratio" during the short process of key-descent.

Thus you must first carefully learn to supply weight (visibly or invisibly as the case may require), and then you must as carefully learn to omit it at the right moment, and on the right occasion.

Note: Thus, the very first step at the keyboard is to pky by Weight-release only, pp, as shown in my "Child's First Steps" and "Nine Steps towards Fingerindividualization." Only when this principle has been grasped for chord and melody-playing, may you proceed to play with "Weight-off" as required for Agility-passages.

Arm-weight which is allowed to rest too heavily upon the keyboard in-between the sounding of the notes, inevitably does infinite harm both technically and musically. It will certainly mar all agility and clearness of passages, and cause "stickiness" on the keyboard. If you rest with the entire weight of your arm on the keyboard, it will also render every passage dull and uninteresting musically, since such solidly-resting weight precludes that nice choice of tone-colour for each note, so imperatively needed if the desire is to make music.
Hence, you must learn correctly to apply the arm, and must learn also to avoid its resting on the keyboard, when not needed. Indeed, the arm may negatively influence technique as well as make it.

Note: More harm, in fact, has been done by such false ideas of weight-transfer touch, than was done in the past by a deliberate striking or hitting of the keys downward.
Indeed, all teaching that recommends various more or less heavy grades of passed-on arm-weight or [German: Schwere Tastenbelastung] should be strictly shunned. This form of mis-teaching (copied by recent writers who ought to know better) has done incalculable harm. In fact it has done as much harm (and perhaps more) than the previous incorrect teaching of forced finger-lifting. The question of weight-transfer (where it should be used, and where not) is fully elaborated in module 12.