帮 (traditional 幫) = 邦 (state) + 巾 (cloth). It first named the side or upper of a shoe — the part 'at the side' supporting it. From 'being at the side' came the warm modern meaning: to HELP, to back someone up.
帮 is 'to help': 帮我 (help me, with 我), 帮你 (help you), and the everyday 帮忙 (bāngmáng) = 'to do a favor / lend a hand'. 请帮我 (please help me) and 你能帮我吗? (can you help me? — reusing 能) are sentences you'll lean on constantly as a learner. 帮 also means a group/gang (帮派). At heart, 帮 is about standing at someone's side — exactly what help is.
Standing at the side (like a shoe's upper) — to HELP, to back up.
帮忙 ('help-busy') is the everyday 'to do someone a favor'. 你能帮我吗? ('Can you help me?') reuses 能 (can) and 吗 (?) — a whole sentence from pieces you know.