Who can recommend software for backlink building?

Don Tung said:

Who can give me a software to build a backlink, I need a software that can build backlinks in bulk.，preferably it is free. Because I have used the money on the goods. There is really no liquidity. Thank.

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Since you have a 0 budget build a few high DA / PA links to your most important pages using some of the sweet walkthroughs found in the BH section.

https://www.blackhatworld.com/seo/tutorials-what-a-nice-monday-to-share-some-links.1142040/page-5#post-12323039

There is a great walk-through post that will fit your budget and help you rank
Goodluck I hope you move some goods!

Joke aside, you will not be able to do effective SEO using only a tool. You really need to do some manual work and invest in paid tools as well (just to save time).

No software, but here are some juicy links shared from another member:

https://www.blackhatworld.com/seo/tutorials-im-bored-so-here-some-cool-links-for-you.1139635/

Do those, and then you can build blog comments and other web 2.0 to those links to give some juice.