向（む）け is a shortened form of the transitive verb 向（む）ける ‘to aim at’, and is considered to be a 造語（ぞうご） (neologism). This means a word that was created for a specific purpose, and may not necessarily be used for anything outside of that purpose. The purpose of 向（む）け is to attach to other nouns, in order to express that something is ‘intended for (A)’, ‘aimed at (A)’, or ‘oriented toward (A)’.
向（む）け may be seen followed by the 格助詞（かくじょし） (case marking particle) に (when followed by a phrase), or the 格助詞（かくじょし） の, when linked with another noun.

• この教科書（きょうかしょ）は上級者（じょうきゅうしゃ）向（む）けに書（か）いてある。
  This textbook is written oriented toward advanced people.
• 子供（こども）向（む）けに書（か）かれた本（ほん）を読（よ）んで日本語（にほんご）を勉強（べんきょう）したら？
  Why don't you study Japanese by reading books written for children?
• オフィス向（む）けのパソコンを10台（だい）買（か）うとしたらいくらになりますか。
  If I were to buy 10 computers intended for office use, how much would that cost?
• これは大人（おとな）向（む）けの映画（えいが）だから、お前（まえ）には見（み）せれないよ。
  This movie is intended for adults so I can't show it to you.

In terms of products and similar items, although 向（む）け highlights that something has been intended for (A), it doesn’t necessarily mean that it is limited to (A).

• 私（わたし）が住（す）んでいる所（ところ）は一人（ひとり）暮（ぐ）らし向（む）けのアパートだけれども、3人（にん）家族（かぞく）でもなんの不便（ふべん）無（な）く住（す）める。
  The place I am living is intended for one person, but even as a three person family, we can live there with no inconveniences.