You may have already chosen a domain name for your site without giving much thought to its extension? The choice usually goes to the most popular .com, but depending on your business it is not necessarily the best, and above all not the only, option to consider for your website.
Popular generic extensions
Originally intended for for-profit companies, the .com is now widespread in every field, and if you have the opportunity to own this extension for your site (that is, if it is available and within your budget), then you should do so.
Besides the "traditional" .com, there are 2 other generic extensions, .org and .net, that are also very popular. Although the .org extension can be used by anyone, it remains the preferred choice for non-profit organizations such as charities, non-governmental organizations or online communities.
As for .net, this extension (originally used by Internet service providers) is now an alternative to .com because it is associated with technology and web-based services, and will therefore suit sites that operate in this technology niche.
Country or region domain extensions
Country extensions are generally the initials of the original name of the country where the website operates. Often subject to conditions, the future owner will generally have to prove their connection to the country in question (.fr for France, .ca for Canada, .it for Italy, etc.). If the audience targeted by your site is, for example, only in France, it is recommended to opt for the .fr, but that does not stop you from also taking the .com, quite the contrary: even if you do not envisage your site ever targeting other countries, it will prevent a competitor or a namesake from overshadowing you on the internet.
In addition, a great many regional and/or major-city extensions are also available. If your geographical location matters in your field, you could also consider choosing a specific local extension, such as .paris if your business is based solely in the city of Paris, or .bzh if your business is local and restricted to Brittany.
Key takeaways...
The choice of your domain name extension must be a wise one, and it will generally be better to choose at least two or even more, if only to protect your domain and your business. The more extensions you own, the better protected you will be, but since domain extensions are countless, you will certainly be limited by cost, as the vast majority are not free. Finally, be aware that buying several extensions will not increase your site's traffic or its search ranking (except qualitatively in the case of a region-specific business), but one extension rather than another may make you easier to remember depending on the different profiles of your visitors, and may even be complementary by including your business in your site's name (for example a .photos if you are a photographer).