Para nosotros no hay duda: cada título debe ser único y potenciar una única palabra clave. Sin embargo, la originalidad del SEO que optimiza el contenido se encuentra en la capacidad de incluir términos relacionados que compongan diferentes palabras claves que permitan abarcar lo que denominamos la "concordancia amplia" de términos.
Por ejemplo, nosotros establecemos en las fichas de productos "Palabra Clave + Precio (en euros) + [Precio 2023]. Esto nos permite abarcar palabras claves como esta:
Whill Model C2
Optimizar la ficha de esta forma nos permite abarcar las siguientes palabras claves:

• Silla Whill Model C2
• Silla Whill Model C2 precio
• Precio 2023 whill model c2
• Mejor precio whill model c2 2023

Interesante debate, espero que te aporten mi planteamiento.

The short answer is: simply use the keywords with the highest volume. But there can be many pitfalls and details which can affect the CTR on the SERP. I love this guide where they tell about them with examples: https://rush-analytics.com/blog/title-of-a-website-optimize-like-a-pro

Identify main topics: Let's say your page is about yoga. Your main topics could be "yoga for beginners" and "yoga poses."

Use keyword research: Using a tool like Google Keyword Planner, you might find that "yoga for flexibility" and "yoga for stress relief" are popular related keywords.

Choose relevant and specific keywords: For a title tag, you might choose "Yoga for Beginners: Poses for Flexibility and Stress Relief" to accurately describe your content.

Keep your title tag short: The example title tag is 58 characters, which is within the recommended 60-character limit.

Avoid keyword stuffing: Don't try to cram too many keywords into your title tag. Instead, use them in a way that accurately describes your content and helps potential visitors find your page.

Optimizing your title tags is one of the easiest ways to help improve your rankings on Google. They signal to Google what your page is about. Keep titles around 60 characters.

Avoid typing your title in all caps. Uppercase letters take up extra space and could cause your title to get cut off.
Remove your brand name unless it’s necessary
Use symbols to save space (i.e., “&” instead of “and”)

Stuffing lots of keywords into a single page title can hurt that page's rankings. And it can also confuse users, making them less likely to click through to your page.

Keep the title tag readable and simple. There are some websites showing title tag score and seo score . You may use those services. Some are free too.

Hope this helps,
Thanks, Yoglica

The title tag is an important part of SEO, and including 2-3 keywords in the title tag can help your website rank higher in search engine results. It is important to make sure that the keywords you choose are relevant to the content of the page, and that they are used in a natural way that makes sense to readers. Additionally, it is important to keep the title tag concise and to the point, as search engines may truncate titles that are too long.

Hola! nosotros apostamos por títulos únicos en nuestras fichas de producto. Hacemos una búsqueda de KW general y apostamos por las más relevantes en los mejores productos.
Mira un ejemplo en nuestra categoría de Scooters eléctricas por ejemplo.
Visita los mejores scooters eléctricos para discapacitados.

@lucybish said in Questions about putting 2-3 keywords in title tag.:

what is the best way to decide the keywords to be used in title tag?

When deciding on keywords to use in the title tag, it's important to consider the relevance and search volume of the keywords. The title tag is one of the most important on-page SEO factors, as it tells search engines and users what the page is about. Therefore, it's important to include keywords that accurately and effectively describe the content of the page. Additionally, it's also a good idea to consider the competition for the keywords and target long-tail keywords that are less competitive. Finally, it's important to make sure that the title tag is compelling and will entice users to click on the link.

@lucybish the key words should be recognize through the body title is one of the important point for the keywords but it is not enough for keywords
also please clear your question do you need to use two keywords in a page or you need to recognize them on a page?