The popularity of badges can be traced back to several important historical stages, which have gradually developed and gained popularity in different periods and contexts:

### 1. ** Origin Period: Middle Ages **
Badges can be traced back to medieval Europe, where they were used as a symbol of status and loyalty. For example:
- ** Knight Badge ** : Used to identify a knight's family, class, or group.
- ** Religious insignia ** : A small metal symbol worn by pilgrims to indicate that they have visited a particular religious shrine.

### 2. ** Renaissance **
With the improvement of handicraft technology, the badge began to serve as a fashion decoration and symbol of power. Members of the nobility and royal family often wear decorative badges to show identity and status.

### 3. ** 19th Century: Industrial Revolution and badge popularity **
The Industrial Revolution boosted the production of badges, especially in the United Kingdom, where they began to be used to promote political activities and organizations. For example:
** * Political insignia ** : In working-class movements and election campaigns, people wear insignia to show their support.
- ** Club and trade union badges ** : Badges are used by trade unions and social organizations to indicate membership.

### 4. ** 20th Century: Crest of popularity **
- ** Military insignia ** : In both World Wars, the military used insignia to identify ranks, units, and achievements.
** * Popular Culture ** : From the 1960s to the 1980s, with the rise of youth culture, badges became a part of popular culture.
Rock bands, political movements, fan clubs, etc., have all started using badges as propaganda tools.
- ** Games and Events ** : Badges made for major events such as the Olympic Games are popular and become collectibles.

### 5. ** Modern: Personalization and branding **
Today, the badge has developed into a multi-purpose cultural symbol, including:
- ** Personalized customization ** : Used by individuals, groups and enterprises to express their personality or brand culture.
- ** Fashion elements ** : accessories on clothing and accessories.
- ** Collection and Commemoration ** : Objects that commemorate important events or occasions.

In general, badges have evolved from practical functions to symbolism to elements of popular culture, especially after the 20th century, becoming indispensable iconic items in many fields.