Can you tell me that which points I have to consider while doing competitor site analysis? How I can do effective competitor website analysis?

Maybe you can start with

1. Analyze their coding and internal/external (inbound/outbound) linking.
2. Analyze on-site SEO paying particular attention to their content. Are they white hat, black hat, grey hat?
3. How many web pages are linked internally (size of web site)?
4. How old is the site?
5. Are the main keyphrase competitors regionally hosted?
6. Do things (images, webpages ...) use logical naming conventions?

etc.

There are many seo programs to help analyse a competitors website

I used to check the backlinks hany owned competitors, after we find it, then we also put a link on their own backlinks

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